What is a Green Abrasive? October 2012 - David Dorrow, Mineral Aggregates Inc.

Influence of UHP Waterjetting on Shop-Primed Steel in New Construction, Part 3 August 2012 - Philippe Le Calvé, DCNS; Jean-Pierre Pautasso, Direction Générale de I’Armement; and Nathalie Le Bozec, French Corrosion Institute

On removing uncured coatings without blasting July 2012

Six Key Points You Should Know about Concrete Surface Preparation before Coating Application

July 2012 - Fred Goodwin, BASF Construction Chemicals

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Removing coal tar epoxies

November 2011

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How Coatings Perform over Waterjetting in New Construction

September 2011 - Philippe Le Calvé, DCNS, France; Jean-Pierre Pautasso, Direction Générale pour I’Armement, France; and Nathalie le Bozec, French Corrosion Institute, France

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Remedying excessive profile

September 2011

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Characterizing Surfaces after UHP Waterjetting in New Ship Construction

May 2011 - Philippe Le Calvé, DCNS, France; Jean-Pierre Pautasso, Direction Générale de I’Armement, France; and Nathalie Le Bozec, French Corrosion Institute

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Concrete rehabilitation: From initial repair to coating protection

December 2010 - H. Michael Simpson, Fox Industries Inc.

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On removing animal fats from concrete

December 2010

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Abrasive blasting: Achieving efficiency and profitability

November 2010 - Patti Roman, Clemco Industries

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On keeping steel clean in food plants

November 2010

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The PSPC from an Owner's Point of View

November 2010 - Carlos Augusto dos Reis Correia, Naval Architect, PETROBRAS TRANSPORTE S.A.—TRANSPERTO, Rio de Janeiro, Brazil

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What's New in Equipment for Protective Coating Work

August 2010 - JPCL staff

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On cleaning rates with abrasive recycling

July 2010

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The case of the failing railing

July 2010

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2010 Equipment Buying Guide

June 2010

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Getting the right profile on weathering steel

June 2010

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The case of the not-so-hot roof

April 2010 - E. Bud Senkowski, PE, KTA-Tator, Inc. & Richard Burgess, KTA-Tator, Inc., Series Editor

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Laboratory Testing of Candidate Coating Systems for Protecting A 490 Bolts in One World Trade Center Construction

March 2010 - John Bullard, Port Authority of New York & New Jersey, and William D. Corbett, KTA-Tator, Inc.

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Problem Solving Forum - On preparing concrete for metalizing

March 2010

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Soluble Salts beneath Coatings - An Overview

February 2010 - Kenneth B. Tator, P.E., KTA-Tator, Inc.

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How Does Waterjet Cleaning Affect the Surface and Surface Preparation?

January 2010 - Lydia M. Frenzel, Ph.D., Advisory Council

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Problem Solving Forum: How to Handle Exposed Rebar when Repairing Concrete

December 2009

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Cases from the F-Files: Coating Failures on Galvanized Mast Arms

November 2009 - Paul Vinik, MSChE, P.E., Florida Department of Transportation and Richard A. Burgess, B.S. , M.S., KTA-Tator, Inc.

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Problem Solving Forum: Checking Abrasives in the Field

November 2009

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Cases from the F-Files: Corrosion of powder-coated aluminum on the Gulf Coast

October 2009 - Richard Burgess and Kenneth B. Tator, KTA-Tator, Inc.

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Problem Solving Forum: On Abrasive Blasting Thin Steel Substrates

October 2009

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Letters to the Editor: On Units for Measuring Chloride Contamination

September 2009

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Preparing Repair Mortars for Wastewater Service: Broom Finish or Blasted Surface?

September 2009 - Vaughn O'Dea and Rick Schwab, Tnemec Company, Inc.

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Surface Preparation: Practices, Equipment, and Standards through 25 Years

August 2009 - Daryl Fleming and Jodi Temyer, JPCL

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The Fix That Was Worse Than the Problem

August 2009 - Raymond Tombaugh, Senior Coatings Consultant, KTA-Tator, Inc. Richard A. Burgess, KTA-Tator, Inc., Series Editor

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Top Product Developments, 1984 to the Present

August 2009 - Harold Hower, Technology Publishing/PaintSquare

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Premature rusting of newly coated structural steel in a chemical plant

July 2009 - Bruce Rutherford, Operations Manager, KTA-Tator, Inc.; Richard Burgess, KTA-Tator, Inc., Series Editor

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Studies on secondary surface prep after UHPWJ and on preparing concrete

July 2009

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2009 Equipment Buying Guide - Surface Preparation

June 2009

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Abrasives Inc.

Absolute Equipment/Grand Rental Station

ARMEX® Cleaning and Coating Removal Systems

Atlantic Design, Inc.

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Axxiom

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Blastox/The TDJ Group, Inc.

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CHLOR*RID International

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Harsco Minerals

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Industrial Vacuum Equipment Corp.

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Montipower, Inc.

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PreTox Products - NexTec, Inc.

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Waterjetting—New Standards for Assessing End Condition Cleanliness Recorded on July 9, 2012

Steps to a More Effective Waterjetting Operation Recorded on March 20, 2013

Safety in Abrasive Blasting Recorded on March 27, 2013

Coatings Inspection Instruments: A PaintSquare Video Education Series Presented by KTA-Tator

eBook: Ultra High Pressure Waterjetting Posted on February 27, 2012; Sponsored by Jetstream

eBook: Achieving Efficiency in Abrasive Blast Cleaning Posted on March 23, 2012; Sponsored by Advanced Recycling Systems

eBook: Selecting the Right Abrasive Posted on January 31, 2013; Sponsored by GMA Garnet Group; Van Air Systems

The Farrow System - 650 MAX Posted on March 29, 2011

Axxiom's Halok Design for Blast Pot Entry Posted on March 24, 2011

EPA’s Ruling Process: Ash Backwards From On the Other Hand by Mary Chollet Posted on 1/8/2013

Too Much Rust for the Weary From Editorial License by Karen Kapsanis Posted on 10/11/2012

WJTA-IMCA Conference & Expo September 9 - September 11, 2013

Free Webinar: New Methods for Testing and Extraction of Soluble Salts June 19, 2013

2012 WJTA-IMCA Expo September 10 - September 12, 2012

Free Webinar: Selecting the Right Abrasive

June 13, 2012

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Webinar: Spot Repair vs. Full Coating Removal

November 16, 2011

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WJTA-IMCA Conference & Expo

September 19 - September 21, 2011

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Is there a place for using “rust convertors” in heavy-duty maintenance projects? Question posted April 22 to April 28, 2013

What is most effective treatment for steel contaminated with MIC before painting ? Question posted March 18 to March 24, 2013

Is it cost-effective to pressure wash a bridge or other structure before abrasive blasting? What pressures, flow rates, and procedures are recommended? Question posted November 12 to November 18, 2012

Is it cost-effective to grind steel edges before coating for atmospheric service? Why or why not?

Question posted October 29 to November 4, 2012

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What causes static electricity during abrasive blasting? What risk does it pose, and how can it be controlled?

Question posted October 15 to October 21, 2012

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What is the proper surface preparation for stainless steel before coating to resist a salt-laden atmosphere?

Question posted September 3 to September 9, 2012

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How pure must fresh water be for water washing or waterjetting, and how do you determine the water’s purity?

Question posted August 27 to September 2, 2012

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What advantages/disadvantages have you seen with using recycled glass abrasives vs. traditional abrasives?

Question posted August 6 to August 12, 2012

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When blasting cast-iron structural steelwork, what type of defects might be found, and how do you address them?

Question posted June 18 to June 24, 2012

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How do you remove all traces of an uncured internal coating from a tank when abrasive blasting is not an option?

Question posted June 4 to June 8, 2012

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In preparing for coating, what is the best way to treat a steel surface that has been attacked by microbiologically influenced corrosion (MIC)?

Question posted May 29 to June 1, 2012

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What is the best way to achieve proper surface preparation in areas with limited access, such as interior box beams on bridges?

Question posted May 14 to May 20, 2012

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How long can a blasted surface be left before priming under different temperatures/relative humidity environments?

Question posted April 16 to April 22, 2012

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How do you determine if local water is suitable for use in UHP waterjetting, particularly in areas where potable water is scarce?

Question posted March 12 to March 18, 2012

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Some painting specifications call for the use of “Best Effort” in relation to blasting. How does one determine “Best Effort?”

Question posted February 20 to February 26, 2012

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What measures must you take to determine and assure the cleanliness of an abrasive?

Question posted February 6 to February 12, 2012

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What is the best method for removing production machine oils soaked deeply into a concrete floor before applying a non-skid coating?

Question posted January 9 to January 15, 2012

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When should you specify UHP waterjetting on bridges?

Question posted October 17 to October 23, 2011

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Specifications often state that glossy surfaces must be dulled before overcoating. What are some methods for doing this, especially when sanding isn’t feasible or desirable?

Question posted August 29 to September 4, 2011

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How can I determine the cleanliness of stainless steel for painting after blast cleaning?

Question posted August 8 to August 14, 2011

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What are the options for shop-applied systems (surface preparation and coating type) to protect the interiors and exteriors of new saltwater storage tanks and associated steelwork that will be exposed to seawater, and that will allow for easy touchup and maintenance once the structures are erected?

Question posted July 25 to July 31, 2011

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What is the remedial action if a blaster produces too high a surface profile for the required primer thickness?

Question posted July 18 to July 24, 2011

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What is the preferred method to remove 25-year-old coal tar epoxy from a carbon steel tank in order to reline?

Question posted June 6 to June 12, 2011

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How clean must the compressed-air supply be for blast cleaning, blow down and painting? How is cleanliness of the air determined?

Question posted April 11 to April 17, 2011

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According to JPCL author David Dorrow, what makes an abrasive “green?” Monday, April 29, 2013

True or false: All the SSPC surface preparation standards are issued jointly with NACE. Tuesday, April 16, 2013

What pressure range would you want to see on a needle gage inserted behind the nozzle of a blast hose? Monday, April 15, 2013

Which of the following answers organizes SSPC abrasive blasting standards from least to most rigorous?

Monday, March 25, 2013

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Determining the particle size distribution of blast abrasive is achieved by what method?

Tuesday, March 12, 2013

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True or false: Ultra-high-pressure (UHP) water jetting is generally ineffective in removing soluble salts from steel substrates.

Tuesday, February 26, 2013

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True or false: The number of surface profile peaks in abrasive-blast-cleaned steel has no effect on coating performance.

Thursday, February 14, 2013

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True or false: In air abrasive blast cleaning of steel, a venture nozzle generates a deeper blast profile than a straight bore nozzle with the same diameter opening.

Wednesday, February 6, 2013

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True or false: In abrasive blasting work, a dosimeter is used to measure exposure to abrasive blasting dust.

Tuesday, February 5, 2013

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True or false: Some state highway departments have banned the use of silica sand for abrasive blasting.

Tuesday, January 29, 2013

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True or false: Dry ice blasting produces a lesser volume of debris than the amount produced by air abrasive blasting using slag abrasive.

Tuesday, January 22, 2013

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True or false: Rubber replica templates from the American Concrete Institute can be used to judge the degree of surface profile on concrete.

Monday, January 21, 2013

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True or false: To hold the blast (prevent re-rusting of blasted steel) inside a tank, one effective measure is to use dehumidification to keep relative humidity below 50%.

Monday, January 7, 2013

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True or false: A broom finish produces a coarse to very coarse finish on concrete.

Thursday, January 3, 2013

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Which of the following cleaning techniques is most likely to remove soluble salts from a heavily pitted steel surface?

Wednesday, January 2, 2013

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True or false: There is an SSPC power tool cleaning surface preparation standard describing a degree of cleanliness that falls between Power Tool Cleaning, SSPC-SP 3, and Power Tool Cleaning to Bare Metal, SSPC-SP 11.

Monday, December 24, 2012

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True or false: A research study by Roper, Weaver, and Brandon indicated that the number of peaks in a steel surface profile created by abrasive blasting has no effect on performance of coatings applied to the steel.

Thursday, December 20, 2012

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True or false: Acid etching does not produce a surface profile on concrete.

Monday, December 10, 2012

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How are water and abrasive combined in wet abrasive blasting?

Wednesday, December 5, 2012

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True or false: SSPC published a surface preparation standard, now discontinued, describing flame cleaning of steel.

Tuesday, December 4, 2012

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What is the minimum surface profile required to meet SSPC’s specification, Power Tool Cleaning to Bare Metal?

Tuesday, November 20, 2012

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True or false: Baking soda can be used as an abrasive in both wet and dry abrasive blast systems.

Wednesday, November 14, 2012

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According to David Dorrow in a recent JPCL article, what constitutes a “green” abrasive?

Friday, November 2, 2012

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When water under pressures of 30,000-40,000 psi is used to clean steel before painting, what is this form of cleaning called?

Monday, October 22, 2012

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If you’re a contractor concerned with meeting the end condition appearance requirements for steel after blast cleaning, what precaution might you take?

Tuesday, October 16, 2012

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Why are inhibitors used in wet blast systems?

Friday, October 5, 2012

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A conductivity meter is normally used to check for what contaminants on abrasive for blasting?

Thursday, October 4, 2012

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True or false: One kind of wet blast system uses air rather than water pressure as the cleaning force.

Tuesday, October 2, 2012

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According to SSPC's Surface Preparation Commentary for Steel and Concrete Substrates (SSPC-SP COM), final dry blast cleaning should not be conducted when the steel surface is less than how many Fahrenheit degrees above the dew point?

Thursday, September 27, 2012

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True or False: SSPC’s recent revisions to SSPC-SP 11 and SSPC-SP 15 changed the standards’ requirements for surface cleanliness and minimum surface profile.

Friday, September 14, 2012

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Which one of the following agricultural materials is typically not used to create abrasives for blasting?

Monday, September 10, 2012

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What is the name of a thin, weak layer of aggregate fines and unreacted constituents at the surface of recently poured concrete?

Tuesday, August 21, 2012

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“Surface Preparation and Cleaning of Metals by Waterjetting Prior to Coating” is a newly revised standard by:

Monday, August 6, 2012

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Which of the following statements about SSPC-SP 11, Power Tool Cleaning to Bare Metal, is true?

Friday, August 3, 2012

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If a specification requires one of the following–brush-off blasting (SSPC-SP 7), commercial blasting (SSPC-SP 6), or near-white blasting (SSPC-SP 10), what other cleaning standard is invoked?

Wednesday, August 1, 2012

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What organization recently issued a standard for measuring the profile of concrete after surface preparation?

Tuesday, July 31, 2012

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In air abrasive blasting, why is it sometimes useful to adjust the angle of attack (angle of the nozzle in relation to the workpiece)?

Friday, July 27, 2012

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Why must laitance and efflorescence be removed before coating concrete?

Thursday, July 26, 2012

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When abrasive is recycled without sufficient new abrasive being added to the operating mix, what happens to the surface profile of steel being cleaned?

Thursday, July 19, 2012

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True or False: The Australasian Corrosion Association is licensed to teach SSPC’s C7 Abrasive Blasting course.

Thursday, July 5, 2012

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Which of the following answers organizes SSPC abrasive blasting standards from most to least rigorous?

Thursday, June 14, 2012

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True or false: There is no quantifiable method for determining the surface profile on concrete substrates.

Friday, June 8, 2012

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True or false: A combination of chemical stripping and (frozen) ice blasting has been used to remove lead-based paint from bridge steel.

Thursday, May 24, 2012

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True or False: Dehumidification equipment is sometimes used to “hold the blast” after surface preparation of the interior of a storage tank.

Monday, May 7, 2012

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True or False: Generally speaking, a high-density abrasive will not clean as fast as a less-dense abrasive.

Thursday, April 26, 2012

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Among the options below, which is the most important in achieving the specified surface profile on steel when you are air abrasive blast cleaning?

Tuesday, April 10, 2012

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What is a typical particle speed for abrasive in an air abrasive blast system that utilizes a venturi nozzle?

Wednesday, March 21, 2012

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Which of the following conditions affect the efficiency of an air abrasive blasting system?

Wednesday, March 14, 2012

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True or false: In air abrasive blasting operations, the same particle size mix of silica sand and coal slag yield different profile ranges on steel.

Tuesday, March 13, 2012

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True or false: If you are removing a soft, pliable coating from a steel surface, a rounded abrasive will be more productive than an angular one.

Wednesday, March 7, 2012

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The SSPC/NACE/AWS specification for thermal-sprayed zinc in a marine service environment requires what degree of blast cleaning?

Monday, February 27, 2012

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How can sponge blasting produce a profile on steel?

Friday, February 17, 2012

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What happens to the existing profile on steel when UHP water blasting is used to remove rust and/or coatings?

Tuesday, February 14, 2012

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What is the name usually given to a robotic surface preparation machine used in the field on ship and tank exteriors?

Tuesday, January 17, 2012

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What are abrasive fines?

Tuesday, January 3, 2012

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A reduction in air abrasive blast nozzle pressure from 100 psi to 80 psi has what effect on the productivity of the blasting operation?

Wednesday, December 7, 2011

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True or false: Use of crystalline silica sand has now been banned from use as a blasting abrasive in the United States.

Tuesday, November 29, 2011

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True or false: Abrasive blasting and other scarification techniques increase the surface area of a steel substrate and provide additional reactive sites for molecular association between paint and metal.

Wednesday, November 2, 2011

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True or false: Potable water without additional treatment is often used successfully for UHP water jetting prior to painting.

Thursday, October 27, 2011

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Which technique would be least likely to remove soluble salts from a steel substrate?

Tuesday, October 25, 2011

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Which of the following is most likely to be the result of excessive profile depth on steel after blast cleaning?

Tuesday, October 18, 2011

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If you need to answer a question about the surface profile requirements for blasted surfaces on a job, what document would you consult?

Friday, October 7, 2011

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A stationary centrifugal wheel blast machine typically uses what type of abrasive?

Thursday, October 6, 2011

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True or false: ISO Sa2.5, describing very thorough abrasive blast cleaning, gives a more comprehensive written description of the end condition of the steel after blasting than SSPC SP 10/NACE No. 2, Near white metal, which requires a similar end condition.

Monday, September 26, 2011

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Which of the following factors influences the appearance of steel after blast cleaning?

Friday, September 23, 2011

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With SSPC abrasive blasting standards, if a Near White Blast Cleaning (SSPC-SP 10) is required, the following additional standard is invoked:

Tuesday, September 20, 2011

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The ISO surface preparation standard Sa 3 most closely resembles what SSPC/NACE surface preparation standard?

Thursday, September 15, 2011

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Which of the following range of readings would you most likely see on a needle pressure gage inserted behind the nozzle of a blast hose?

Friday, August 26, 2011

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Power tools, such as power wire brushes, can burnish or polish a steel surface. What is the main problem with this?

Thursday, August 18, 2011

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Which of the following cleaning techniques is least likely to remove soluble salts from a steel surface?

Monday, August 8, 2011

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True or false: In abrasive blasting, the harder the abrasive, the deeper the profile it is likely to generate.

Tuesday, August 2, 2011

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Which of the following statements about SSPC-SP 11, Power Tool Cleaning to Bare Metal, is correct?

Monday, August 1, 2011

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A White Metal Blast, SSPC-SP 5, allows what to remain on the surface after blast cleaning?

Thursday, July 28, 2011

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What would be the most likely result of excessive profile on a steel substrate after abrasive blasting?

Friday, July 22, 2011

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In general, when is it better to use impact (needle gun, roto peen) rather than rotary (wire brush, coated abrasive) power tools?

Wednesday, July 20, 2011

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True or false: Potable water in a UHP water jetting system is normally of sufficient cleanliness that it will not deposit detrimental contaminants on a steel surface.

Tuesday, July 19, 2011

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What is likely to be the result of oil in the compressed air used for abrasive blast cleaning?

Monday, July 18, 2011

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Which of the following persons has conducted research and published articles in JPCL and elsewhere on flash rusting after water jetting?

Tuesday, July 12, 2011

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Why is it sometimes useful to adjust the angle of attack (angle of the nozzle in relation to the work piece) when conducting air abrasive blasting?

Thursday, July 7, 2011

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In air abrasive blasting operations, how is a moisture separator or filter used?

Tuesday, July 5, 2011

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SSPC's photographic guides for visual assessment of surface cleanliness after blast cleaning are designed to be used in what way?

Friday, July 1, 2011

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What is the purpose of inhibitors used in wet blast systems?

Tuesday, June 21, 2011

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Power tools such as power wire brushes can burnish or polish a steel surface. Why is this sometimes a problem?

Friday, June 17, 2011

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What is most likely to help you achieve the specified profile on the steel you are blast cleaning?

Thursday, June 16, 2011

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A conductivity meter can be used to check for what contaminant on abrasive?

Wednesday, June 15, 2011

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True or false: A research study by Roper, Weaver and Brandon indicated that the number of peaks in a steel surface profile created by abrasive blast cleaning affects coating performance.

Wednesday, June 1, 2011

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True or false: CO2 blasting can produce a profile on steel.

Wednesday, May 18, 2011

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Which of the following is not used for measuring the surface profile of cleaned steel?

Friday, May 13, 2011

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What is the main reason for a sieve analysis of abrasive?

Tuesday, April 26, 2011

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Sulfate-reducing bacteria contribute to corrosion by what mechanism?

Wednesday, April 20, 2011

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Surface profile on steel, measured as peak-to-valley height of the roughness, has several other names, including which of the following.

Monday, April 18, 2011

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Which of the following abrasive types is normally the hardest?

Friday, April 15, 2011

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What is abrasive friability?

Thursday, March 31, 2011

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In its Technology Update on retrieving soluble salts from a steel substrate in the field, SSPC describes two methods. One is swabbing; what is the other?

Monday, March 21, 2011

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A needle scaler is what type of power tool?

Wednesday, March 2, 2011

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True or false: Rubber replica templates from the American Concrete Institute can be used to judge the degree of profile on concrete substrates after surface preparation.

Monday, February 28, 2011

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Which of the following can cause excessive surface profile?

Monday, February 14, 2011

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True or false: In protective coatings work, "smut" refers to the metallic fines that cling to a steel substrate after it is cleaned with metallic abrasive.

Wednesday, February 9, 2011

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