PaintSquare.com
      | Connect Follow us on Twitter Like us on Facebook
About | Subscribe | Advertise
  

 

Free Download of our eBook on Overcoating Bridges and Other Structures

Problem Solving Forum

| More

October 22 - October 28, 2012

Under what conditions should small-diameter blisters (<1.5 inches) in a water tank lining be repaired/repainted? Should the blisters be broken and the substrate examined?



More items for Quality Control


Selected Answers

From Tom Schwerdt of Texas Department of Transportation on October 26, 2012:
     If the blisters aren't growing any further and there isn't active corrosion, it's probably better to just leave well enough alone until the whole tank is recoated. If the blisters are growing or there is active corrosion, repairs should be undertaken.

From Giuseppe Santagata of NACE Certif. Coat. Insp. level III # 2737 on October 24, 2012:
     Blister formation indicates lining failure, so the lining shall be repaired properly. To know the probable causes, the blister shall be broken and internal liquid and substrate examined for soluble salt contamination or for presence of eventual inclusions (e.g. abrasive residual, dust, etc.) In order to issue after the exam the right procedure for cleaning and recoating, it is preferable to have the coating manufacturer's assistance during the investigation and issuance of the repair procedure.

From James Albertoni of CA Department of Water Resources on October 22, 2012:
     It really depends on what's behind the blisters and what the tank is holding. If testing of the liquid behind the blister shows it to be relatively non-corrosive, the steel shows no signs of active corrosion, and the liquid in the tank is not all that permeable to the coating (or is non-corrosive), then the blisters should be okay to leave; however, notice that you have to break a couple blisters to determine this. Either way, any blisters you do break should always be repaired prior to putting the tank back into service.

From Murjan Murjan of Sirte Oil Company on October 22, 2012:
     Spot repairs are required. Just remove the blisters using spot blast-cleaning and recoat the repair areas.

Please sign in to submit your answer this question    

Tagged categories: Blistering; Coating failure


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

KTA-Tator, Inc. - Corporate Office
KTA-Tator
Coatings Inspection

Any structure, any height, any place - A qualified coatings inspector is always available. Call 800-245-6379.


Elcometer, Inc.
Elcometer 266
DC Holiday Detector

Easily Finds Pinholes, Flaws & Thin Spots; Safer, More Reliable Testing; Voltage-Adjustable Keypad; Dual-Safety Switch On Handle.


SSPC: The Society for Protective Coatings
http://www.sspc.org/

Join SSPC and Enhance
Your Career !


Nationwide Overspray
Profession Overspray Removal Services

The Finest Name in Safe Overspray Removal. We specialize in removing all contaminants from any surface. Family Owned and Operated for 33 years! Fully insured. Satisfaction is guaranteed.


Fischer Technology Inc.
Measure TSA Coatings on Stainless Steel

The PHASCOPE® PMP10 from FISCHER precisely measures thermally sprayed aluminum (TSA) on stainless steel.


Thermion Inc
Buy Back Program

We are offering $5,000
credit for your old Model
This drive system is
being discontinued by
the manufacturer.
More information at
thermioninc.com
877.884.3428


Modern Safety Techniques
Modern Safety Techniques

With our unique LTCat, we can help to provide clean, safe breathing air to your workers. Take a look at our Breathing Air Systems, we supply at least twice as much charcoal as our competitors! Modern


NLB Corporation
MiniARM automates surface prep

NLB’s Mini ARM lets an operator control high-pressure water jets remotely, with fast tool changes for different jobs. It maximizes protection and productivity.


SAFE Systems, Inc.
Enduroguard -
The Tough Cable
for a Tough Industry.

Reduce maintenance costs and down time, increase job site safety with Enduroguard Cable. Available exclusively from SAFE Systems. UL listed, flexible, abrasion resistant and cut resistant.


Corrosion Probe, Inc.
From Detection to Correction

Corrosion Probe, Inc. has the Most Concrete Coatings Experience and Expertise. Contact us today at
860-767-4402, www.cpiengineering.com

 
 
 
Technology Publishing

The Technology Publishing Network

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

 
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 2000-2015, 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