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+ Metallurgy
+ Acids
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+ Hydrochloric acid
+ Stainless steel
Posted by
Marchen Grith

Does hydrochloric acid affect stainless steel?

Alan Mayer  Follow

Yes HCl affects stainless steel. Here is a catch and it is like when we use 100% pure HCl without dilution then it is less corrosive but if we add water and then it becomes more corrosive.

Reason is obvious : in dilute condition H(+) and Cl(-) are present in separate form and this Cl is detrimental as it causes pitting corrosion as well as crevice corrosion in this type of steel.

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Arshu Khan  Follow

Remember there are many stainless steel alloys some more chemical resistant than others

High carbon steel can be attacked by hydrochloride acid and even much weaker acids

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