April 13, 20251 yr Popular Post Learned something about rust prevention on cast iron and steel. NAOH, that's right, drain opener, Lye. Wipe a solution of NAOH on an otherwise unprotected surface, and it won't rust. I couldn't wrap my head around it not bing a chemist so I just had to try it. I took a spoon of drain opener in some water and immersed a hunk of cheap A-36 steel in it after grinding on the steel to expose it to the solution. a day later no rust. a day after taking it out of the solution and setting it unrinced on the counter and no rust. So I had to moisten it. Still no rust. Can't say this about chlorine but both are alkaline.
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