PaintSquare.com


The First Word in Protective & Marine Coatings

A Product of Technology Publishing / PaintSquare
JPCL | PaintSquare News | Durability + Design | Paint BidTracker

Download the FREE Equipment and Rental Resource Guide

Problem Solving Forum

| More

September 7 - September 12, 2010

What kind of coating system, including surface preparation, should be used to protect a steel factory roof that is subject to hydrochloric acid vapors and other industrial pollutants and particulates in a hot, humid environment?


Selected Answers

From Jorge Lizarraga of International Paint on September 20, 2010:
In my opinion, the ideal coating to use in this service is a vinyl ester novolac coating, or a glass flake reinforced vinyl ester. The primer should be 2 to 5 mils thick, and the finish coat should be 15 to 25 mils thick. Surface preparation should be SSPC-SP 10. Nowadays, these sorts of coatings are used to succesfully paint tanks containing hydrochloric and sulfuric acid.

From Marco Antonio Alvarado Meneses of Consultant Lima - Perú on September 9, 2010:
It is important to see that there is no single coating or coating system that can satisfy every service condition or environment that exists. Selecting the best coating system for a given exposure environment is dependent on identifying and understanding how the particular environment impacts various coatings. Often, the coatings selection is based on knowledge of other (similar) processes or projects. Sometimes the effects of certain chemicals and conditions on various generic types of coatings are not known. It is advisable to carry out testing in order to verify a good performance of the selected coating. Testing should be based on the environment to which the coating will be exposed In addition, the coating choice or paint operation may be restricted by environmental regulations and other constraints. Most coating manufacturers provide information on the resistances and application tolerances of their products. The following criteria should be considered prior to system selection: Type of structures to be coated Identify exposure environments Identify regulatory requirements Select coating materials for project Identify surface preparation and application requirements Cost Manufacturer recommendation Application Maintenance The more aggressive the environment, the higher performing the coating and surface preparation system should be.

From Rudi Rennert of Rhino Linings Corporation on September 7, 2010:
First, the in-service solution strength, additional chemical exposures, and environmental temperatures should be considered before specifying a particular coating. Once an appropriate coating has been chosen on the basis of having complete information, then the preparation can begin. The steel roof should be abrasive-blasted to a near white finish (SSPC-SP 10). Chloride testing should be done to insure no soluable salts remain on the surface. A zinc-rich epoxy primer should be applied to the chloride- free, clean, dry surface. Finally, a coat of a highly crosslinked, chemically resistant polyurethane/urea should be applied to 60-80 mils.

Please sign in to submit your answer this question    

Tagged categories: Roof coatings; Surface preparation


Current PSF Question | Submit a PSF Question | Full PSF Archive

Atlantic Design, Inc.
OUR QUALITY & YOUR TIME.

Many service issues can be easily solved over the phone. When you do need parts, ADI has most in stock for all your blasting needs. 866.Call.ADI


N.T. Ruddock Co.

Our Abrasives Hold Up Under Pressure

N. T. Ruddock focuses on abrasive selection, equipment evaluation, equipment maintenance & reduction of abrasive consumption. Other services include Screen Analysis & Background Radiation Testing.


Industrial Vacuum Equipment Corp.
Hurricane Vacuums
& Dust Collectors

Vacuum and dust collector hose, filters and related accessories.
IndustrialVacuum.com


Clemco Industries Corp.
Powerful Protection in a Small Package

Mounts inside blast helmet, alerts operator to dangerous breathing-air condition by audible, visual, and vibratory alarms. Easily calibrated, battery operated.


LS Industries
LS Blasters: Optimum Steel Cleaning Efficiency

Simplify surface prep with the precise shot control of LS Blasters. Our blast technology delivers optimum coverage and finish. 800-533-8008


Van Air Systems
Fill Your Air Dryer with
Dry-O-Lite.

Only Dry-O-Lite desiccant from Van Air Systems keeps compressed air lines dry and trouble free. Perfect for blasting and painting.


Abrasives Inc.
Need abrasives FAST?

Emergencies happen – who bails you out? One call to Abrasives Inc. and it's taken care of. Period. Sales support available 24/7.
800-584-7524

 
 
 
Technology Publishing

The Technology Publishing Network

The Journal of Protective Coatings & Linings (JPCL) PaintSquare
Durability + Design Paint BidTracker JPCL Europe

 
EXPLORE:      JPCL   |   PaintSquare News   |   Interact   |   Buying Guides   |   Webinars   |   Resources   |   Classifieds
REGISTER AND SUBSCRIBE:      Free PaintSquare Registration   |   Subscribe to JPCL   |   Subscribe to PaintSquare News
MORE:      About PaintSquare.com   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us
 

© Copyright 2000-2014, Technology Publishing / PaintSquare, All rights reserved
2100 Wharton Street, Suite 310, Pittsburgh PA 15203-1951; Tel 1-412-431-8300; Fax 1-412-431-5428; E-mail webmaster@paintsquare.com