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Hydrogen Peroxide in finishing process

I have read a formula for electrograining aluminum that use peroxide as an additive, can anyone tell me what function of the peroxide in a electrograining process (etching aluminum with an AC current and diluted HCl)? Would the peroxide precipitate the dissolved aluminum ion?

Wailok Yee
- Hong Kong
1999

H2O2 is for desmutting purpose some of the AL contact high Si and copper H2O2 help to remove smut after chemical polishing

frankie lim
- malaysia
1999

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