Learning Center

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With many of the goods and services we buy, quality is simply expected. It’s an aspect of good business that’s simply taken for granted. You’d expect a reputable mechanic to get your car running again, for instance, or that your favorite restaurant will keep serving up the kind of food you’ve come to expect.

But in some industries, quality control is simply too important to make assumptions about. The stakes are just too high to trust the workmanship to a contract and a handshake. Those are the industries coating inspectors find themselves working in. The quality...

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Nondestructive testing is the only viable option for inspecting coatings systems that are already in service and are intended to be kept in service. As you may have guessed, NDT is a subset of testing procedures that do not compromise the integrity of the system or material while being conducted. In much of manufacturing, measuring things like hardness, ductility and tensile strength involves stressing parts or materials to their breaking points. The only way to really tell where that breaking point is, with most of these methods, is to break them.

NDT is different. As applied to...

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COATING FAILURE

Everything might look fine when metal components are joined, but even small gaps between fixtures are open invitations to what is known as crevice corrosion. Left unchecked, crevice corrosion can cause significant degrading of your asset—leading to costly repairs, loss of production, and even failure of entire systems.

To ensure assets remain productive and safe, it’s critical to understand what crevice corrosion is, how it happens, how to identify it on your metal assets and what you can do to prevent it.

What is crevice corrosion?

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Understanding what pitting corrosion is, how it starts and how to prevent it goes a long way to ensuring long, safe and useful service for metal assets exposed to the elements.

Pitting corrosion is believed to be the cause of a deadly bridge collapse in 1967. Forty-six people died when the U.S. Highway 35 between Point Pleasant, WV and Kanauga, OH fell into the Ohio River.

Investigators determined a small crack formed when one of the bridge’s eyebeams was cast decades before...

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Galvanic corrosion refers to the damage that occurs to an asset when two different kinds of metal are joined in a corrosive environment.

When the environmental conditions are right and the metals are in electrical contact with one another, one of the metals will corrode more quickly than if it were on its own while the other will corrode much more slowly.

While galvanic corrosion can cause serious failures, preventing it is as simple as understanding the chemistry behind it, designing against...

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