| Connect Follow us on Twitter Like us on Facebook
About | Subscribe | Advertise


Download our free ebook on Advances in Corrosion Control Coating Technology

Problem Solving Forum

| More

June 25 - July 1, 2012

What coating problems are likely in storage tanks that have dissimilar metal sides and floors?

More items for Quality Control

Selected Answers

From Loren Hatle of CorrLine International, LLC on July 6, 2012:
     Usually, the most common dissimilar metals issues are repairs with, i. e., new, (recycled) steel attached to the original steel. The problem with this is the contaminant load on new steel is usually very high because if the high loads of non-water-soluble sulfides  have covalent bonded salts. The quench water in recycled steel is recycled water. This recycled water exacerbates the contaminant problem and creates multiplie reactive sites on the surface of the steel. A solution would be to creat a uniform receptive surface with the removal of these contaminants. There is a solution.

From Jeremi Day of Allphaz Inspection Services on June 25, 2012:
Dissimilar metal will cause galvanic corrosion which, by definition, is "an electrochemical process in which one metal corrodes preferentially to another when both metals are in electrical or direct contact or are immersed in an electrolyte together." This process essentially turns the less noble metal into an anode. The rate of corrosion is determined by the electrolyte and the difference in nobility. The difference in nobility is determined by the difference in voltage potential. The galvanic series provides a clear understanding of electro-potential between different metals. This type of corrosion cannot be stopped using coatings. The only way is to insulate these metals from each other. In addition, due to the galvanic corrosion, other defects could potentially occur such as disbondment, cracking, flaking, checking, etc. The list goes on and on.

Please sign in to submit your answer this question    

Tagged categories: Metals; Tank interiors

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

Fischer Technology Inc.

Paired with the PHASCOPE PMP10, Fischer’s new probe is quick and accurate for measuring thermally sprayed aluminum on stainless steel. Click to learn more.

KTA-Tator, Inc. - Corporate Office
KTA Online
Instrument Catalog

• Any Manufacturer
• Any Instrument
• Any Time
Or call 800-582-4243

Mitsubishi Gas Chemical America
Performance Amine 1,3-BAC

A highly reactive cycloaliphatic diamine offering superior performance. Reasonable cost and curing efficacy makes it suitable for all types of epoxy resin applications.

Dehumidifiers, Sales and Consulting
How long can you hold a WHITE-METAL BLAST?

Click to learn how 30 DAYS is easy! Don Bechtol has over 40 years of experience utilizing DH for blasting/coating projects. Call today.

Humidity & Temperature Control Equipment

Rental Desiccant Dehumidifiers, ArcticDRY Units, Air Conditioners, Heaters and Generators to help control the climate on your next industrial painting project. Nationwide locations, 24/7 service: (866) 379-2600”

Corrosion Probe, Inc.
From Detection to Correction

Corrosion Probe, Inc. has the Most Concrete Coatings Experience and Expertise. Contact us today at

HoldTight Solutions Inc.

Our HoldTight®102 salt remover & flash rust
preventer prevents flash
rust by removing surface contaminants. Contact us
for your nearest distributor.
(800) 319.8802

Sherwin-Williams General Polymers Resinous Flooring App

Our coatings and linings expertise available 24/7, allowing you to explore the Sherwin-Williams systems best suited for your flooring needs. Download the app today!

DeFelsko Corporation
PosiTector Surface Profile

Two solutions for measuring peak-to-valley surface profile height with or without replica tape.

Novetas Solutions
Safer Abrasive! 100% Recycled Glass!

NO Free Silica, Beryllium or other human Toxins! Great White Metal Finish and safer than Slags!
Call us at 866-775- 6226

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   |   Privacy policy   |   Terms & conditions   |   Site Map   |   Search   |   Contact Us

© Copyright 2000-2016, 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