Optimizing Phosphating Process for Steel Wire and Properties of Phosphating Film

LIN Hongchao; XIE Tian; JIANG Xiaoming; LI Huiyong; HUANG Chao

doi:10.11973/fsyfh-201904008

Corrosion & Protection > 2019 > 40(4): 276-280. > DOI: 10.11973/fsyfh-201904008

LIN Hongchao, XIE Tian, JIANG Xiaoming, LI Huiyong, HUANG Chao. Optimizing Phosphating Process for Steel Wire and Properties of Phosphating Film[J]. Corrosion & Protection, 2019, 40(4): 276-280. DOI: 10.11973/fsyfh-201904008

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Optimizing Phosphating Process for Steel Wire and Properties of Phosphating Film

1. School of Chemistry and Chemical Engineering, Guizhou University, Guiyang 550025, China;
2. National Key Laboratory of Efficient Utilization of Low Grade Phosphate Rock and Its Associated Resources, Guiyang 550016, China;
3. Wengfu (Group) Co., Ltd., Guiyang 550002, China

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Received Date: May 14, 2018

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Abstract

Phosphating solution was prepared using phosphoric acid,nitric acid and zinc oxide.The process parameters of free acidity,total acidity,phosphating temperature and phosphating time were optimized by copper sulfate drop test.The microstructure,wettability and acid and alkali corrosion resistance of phosphating film were studied by scanning electron microscopy (SEM),contact angle measuring and acid and alkali corrosion testing.The results show that the optimum process parameters for phosphating were free acidity of 17.8 mg/g,total acidity of 93 mg/g,phosphating temperature of 60℃,and phosphating time of 5 min.The phosphating film prepared under the optimum process parameters was dense and uniform,composed of flaky phosphate crystals,with a certain hydrophobicity and good corrosion resistance to acid and alkali.
- steel wire,
- phosphating,
- technology,
- corrosion resistance

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