Corrosion behavior and passive film properties of nickel-based alloy in phosphoric acid

Yuan Zhang,Xian Zhang,Siyu Chen, Jing Liu,Teng Li,Lingyu Wang,Kaiming Wu

Corrosion Communications（2023）

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摘要

•The increasing concentration of H3PO4 accelerated the corrosion rate of alloy.•The passive film has an outer layer rich of FeOOH and an inner layer rich of Cr2O3.•The inner layer was destroyed in H3PO4 at concentrations higher than 1 M.•Insoluble Fe phosphate compounds precipitated at concentrations higher than 1 M.•Corrosion initiated form the inclusions rich of N, Nb and Ti with a core of Mg and O.

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关键词

Nickel-based alloys,Phosphoric acid,Electrochemical corrosion,Passive film

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