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doraamy

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  1. I'm now doing a science project about rust converting. I use tannic acid and phosphoric acid to react with rust to form a complex, which in turn protects the iron. when i did the exp, a blue-black coating was formed, which should be the iron-tannate complex, but the coating was somehow detached no matter how long i react the acids with rust. What can I do to improve the process?
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