Peracids are being considered as bleaching media with low environmental impact.The performance of candidate alloys was evaluated by coupon tests and electrochemical polarization tests in pulp-free laboratory solutions of peracetic acid (a mixture of acetic acid and hydrogen peroxide),Caro's acid (a mixture of sulfuric acid and hydrogen peroxide),and mixtures of the two solutions.0.1% or 0.2% chlorides were added to these test solutions.All the solutions could be handled in Alloy 2205.Type 304 stainless steel was adequate for some of the conditions tested.
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