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| Application of Cold Sprayed Nickel Coating on Corrosion Prevention of Stainless Steel Solder Joint |
| Received:November 29, 2020 Revised:December 19, 2020 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2020.12.012 |
| KeyWord:cold spray stainless steel spot welding corrosion |
| Author | Institution |
| LIU Run-fang |
Beijing Xinfeng Aerospace Equipment Co., Ltd., Beijing , China |
| WANG Yi-lin |
Beijing Institute of Computer Technology and Application, Beijing , China |
| SUN Cai-yun |
Southwest Technological Engineering Research Institute, Chongqing , China |
| DING Xing-xing |
Southwest Technological Engineering Research Institute, Chongqing , China |
| CONG Da-long |
Southwest Technological Engineering Research Institute, Chongqing , China |
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| Abstract: |
| The work aims to study the effect of cold sprayed nickel coating on the corrosion behavior of stainless steel solder joints, and provide a basis for improving the corrosion resistance of stainless steel welded structural parts. Cold spraying technology was used to prepare pure nickel coating on the surface of 316L stainless steel spot welding structural parts. Based on the detection and analysis of metallographic structure and acid salt spray corrosion performance, the corrosion behavior of the stainless steel solder joints was studied under coated and uncoated conditions. A high-density pure nickel coating with a porosity of not more than 0.5% was prepared on the surface of stainless steel welding joints by cold spray technology. After 96 hours of acid salt spray test, the coated stainless steel spot welding structure had no corrosion. The passivation film on the surface of stainless steel is damaged during the spot welding process, and the substrate is exposed to the corrosive medium, which leads to corrosion in the solder joint area. After the high-density nickel coating is prepared on the surface, the solder joint is shielded and protected by a high corrosion-resistant coating, effectively improving its corrosion resistance, and meeting the requirements on the use of a certain equipment stainless steel structure under acid salt spray conditions. |
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