What is corrosion?
Corrosion is so common a concern that it can sometimes fall on deaf ears. But hear this: A NACE study released in 2016 estimated that corrosion costs the world $2.5 trillion a year. The study estimated that as much as $875 billion a year could be saved if existing corrosion control measures were implemented. Clearly, the key to a profitable service life for critical metal assets requires protecting them from corrosion. That begins with an understanding of the basics of the process itself. Corrosion is a loss of mass caused by a metal’s natural reaction to the atmosphere around it. That loss of mass makes metal assets or structures less able to handle the stresses they were designed to sustain. Left unchecked, corroded assets are bound to fail. The metals common in industrial applications today are highly processed so they […]
Types of corrosion
Corrosion control systems
Just as there are numerous modes of corrosion, there are many ways to combat it. Carefully consider your assets and the environment, and note that some control measures make more sense than others in given applications. In weighing the economic and practical impacts presented by the alternatives, a program made up of a combination of available corrosion control measures is often the most effective. Common corrosion control systems are listed below. Protective coatings Protective coatings are widely used and considered extremely effective corrosion control systems when they’re applied appropriately. And it’s not merely paint, as any continuous film forming a barrier between metal and the environment is considered a protective coating that slows the electrochemical reactions responsible for corrosion. Liquid-applied coatings that dry to form solid films over metal surfaces are a popular choice. Often, these coatings feature chemical additives […]
Tips for choosing and applying antifouling paint
While a ship’s hull spends most of its time underwater and out of site, it must remain very much in mind in terms of its protective coating. That’s because ships are at risk of fouling—the attachment to a submerged surface of sea organisms like grass or barnacles. Fouling can cause a few different problems that begin to snowball if they’re not quickly addressed, including: Adding significant drag, slowing vessels in transit. Added drag means ships must work harder —and expend more fuel— to maintain speed. Fouling on a hull left unchecked can also spur corrosion, adding another element to the problem. In our Good Painting Practice manual, we estimate the marine industry could save between 37 and 75 million tons of fuel each year if proper antifouling measures are taken on the 80,000-plus seafaring vessels in operation. Choosing the right antifouling […]