Ammonium chloride corrosion is the general or localized corrosion, often pitting, normally occurring under ammonium chloride or amine salt deposits. All commonly used materials are susceptible to ammonium chloride corrosion. A small amount of _________ can lead to very aggressive corrosion.
Ammonium chloride salts are highly hygroscopic, meaning they have a strong tendency to absorb water from the environment. The absorption of even a small amount of water can create a highly corrosive environment, leading to very aggressive corrosion of materials. This is because water facilitates the dissolution of the ammonium chloride, enhancing its corrosive effects.
Ammonium chloride salts are hygroscopic and readily absorb water. A small amount of water can lead to very aggressive corrosion [>100 mpy (>2.5 mm/yr)].