A process for pickling and passivating stainless steel using a bath of the following initial composition: H2SO4 at least 150 g/l Fe3+ at least 15 g/l HF at least 40 g/l stabilized H2O2 1-20 g/l non-ionic surfactants and acid attack inhibitors 1 g/l, into which an air flow and an H2O2 quantity of between 0.3 and 1 g/l per hour, controlled to maintain the bath Redox potential at /= 350 mV, are fed in continuously.
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机译：一种使用以下初始组成的镀液对不锈钢进行酸洗和钝化的方法：H2SO4至少150 g / l Fe 3+至少15 g / l HF至少40 g / l稳定的H2O2 1-20 g / l非离子表面活性剂和酸侵蚀抑制剂1 g / l，控制其入流氧化还原电势保持在> / = 350 mV，每小时向其中流入的气流和H2O2量在0.3-1 g / l之间不断喂食。
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