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In this way, can I use lye on stainless steel?

Lye does not react to stainless steel. When you get into making bigger batches of soap, a big stainless steel pot is a lifesaver.

Subsequently, question is, does sodium hydroxide react with stainless steel? Corrosion resistance of stainless steels Below 80 degC they can be considered resistant to any concentration of sodium hydroxide, up to the limit of solubility. There can be a risk of stress corrosion cracking (SCC) attack at higher temperatures, which is common to both the 304 and 316 types.

Then, does lye react with metal?

Lye is an alkali chemical- sodium hydroxide, also known as caustic soda. Never add water to lye because it will react violently and may splatter. Always add lye slowly to cool water and wear protective clothing such as long gloves. Lye will react with metals such as aluminum, cast iron and steel.

Does lye react with aluminum?

Aluminium reacts with lyes to produce hydrogen gas. Since hydrogen is flammable, mixing a large quantity of a lye such as sodium hydroxide with aluminum in a closed container is dangerous—especially when the system is at a high temperature, which speeds up the reaction.