Here's an interesting article claiming zinc chloride has a slower corrosion rate than RA and amines/amonnia.? They specify rosin activated with halides (Cl, Br, F, containing compounds).? Zinc chloride is a metal halide.??
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Something seems fishy about this study.? The zinc chloride performed better than the copper wire alone?? Hmmm...
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https://dergipark.org.tr/en/download/article-file/3231061
Frank Mashockie