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冯力,畅继荣,李洞亭,安国升,李文生.低压冷喷涂Cu-Zn复合涂层耐蚀性能的研究[J].稀有金属材料与工程(英文),2020,49(6):2029~2038.[Feng Li,Chang Jirong,Li Dongting,Guo-sheng An and and Wen-sheng Li.Corrosion Resistance of Low Pressure Cold Sprayed Cu-Zn Composite Coatings[J].Rare Metal Materials and Engineering,2020,49(6):2029~2038.]
Corrosion Resistance of Low Pressure Cold Sprayed Cu-Zn Composite Coatings
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Received:March 25, 2019  Revised:April 12, 2019
DOI:
Key words: low pressure cold spray  copper zinc coating  chrome plating  static soaking  CASS
Foundation item:国家重点研发计划(2016YFE0111400);甘肃省重点研究项目(17YFIWA159);中国博士后科学(2018-63-200618-34)
Author NameAffiliation
Feng Li,Chang Jirong,Li Dongting,Guo-sheng An and and Wen-sheng Li  
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Abstract:
      In this paper, a low-pressure cold spray technique was used to prepare copper-zinc coated samples on 45# steel substrate and 45# steel plus chrome-plated substrate. Corrosion performance of coatings and coatings with chrome plating by static soaking and copper accelerated acetate spray corrosion test (CASS). The microstructure and elements of the coating and chrome plating before and after corrosion were characterized by SEM and XPS. The results show that the corrosion resistance of copper-zinc coating is better than that of copper-zinc coating plus chrome plating during static corrosion. In the CASS experiment, with the increase of zinc content in the original powder, the corrosion resistance of the coating sample and the coating plus chrome plating sample is improve. When the copper-zinc ratio is 6:4, The corrosion resistance of the corresponding coating sample, the coating plus chrome layer sample and the pure chrome layer reaches the sixth grade. Copper and zinc coatings are corroded in the corrosive liquid due to electrochemical corrosion and chlorination. The corrosion products are mainly Zn(OH)2, Cu2O and CuCl2. In the process of corrosion of copper-zinc coating and chrome-plated layer, the corrosion of zinc can play a role in slowing the corrosion of chrome plating. The effect of this mitigation together with the copper film deposited on the chrome layer protects the chrome layer and enhances its corrosion resistance.