高階瓷金&陶瓷熔射塗層防蝕研究

The study on the corrosion resistance of mechanical coatings and ceramics coatings deposited using thermal spraying

本研究目的為尋找在高濕度或高鹽份的環境中具有腐蝕抵抗能力的材料，並兼具良好的機械性能，因此所選擇的材料需具有相當的縱向耐磨耗性及剪力抗彎曲性能，為此目的，漢泰的研發團隊進行相關論文研究與材料資訊的搜集，以搜尋具有較耐腐蝕、耐磨耗能力的材料，以進行相關熔射製程研究。本研究中假設塗層需要承受不斷的往復動作，而磨耗測試則等同模擬實際的使用狀況，可得知在這樣的狀況下，何種材料可以有較低的磨耗重量損失。熔射皮膜的斷面金相檢驗，用以確認目前各種選擇材料在進行熔射製程後之皮膜狀況，觀察各塗層皮膜的氣孔多寡、進行硬度之量測、與基材的結合程度之觀察，並確認所製作之熔射皮膜的品質。在腐蝕環境下，塗層需具備長時間抵抗侵蝕的耐蝕性，且部件在不同的使用情況下可能還會承受軸向與縱向的應力，甚至承受彎曲應力，一但塗層因彎曲應力產生裂縫可能導致整層塗層的剝落。利用以上幾種測試綜合評比結果選擇了WC-20Ni7Cr為最適合本測試使用環境之材料。

The purpose of this study is to find materials with corrosion resistance in high humidity or high salt environments, and have good mechanical properties, so the selected materials need to have considerable longitudinal wear resistance and shear resistance. For this purpose, Han-tai's R&D team conducts network-related paper research and material information collection to search for materials with corrosion resistance and wear resistance for related spray process research. In this study, it is assumed that the coating needs to undergo constant reciprocating motion, and the abrasion test is equivalent to simulating the actual use condition, and it can be known which material can have a lower wear weight loss under such conditions. The cross-section metallographic examination of the sprayed film is used to confirm the film condition of various selected materials after the spraying process, and to observe the pore size of each coating film, measure the hardness, and observe the degree of bonding with the substrate. And confirm the quality of the produced spray film. In corrosive environments, the coating needs to have corrosion resistance against corrosion for a long time, and the components may withstand axial and longitudinal stresses under different conditions of use, and even with bending stress, once the coating is cracked due to bending stress. May cause peeling of the entire coating. Using the above comprehensive test results, WC-20Ni7Cr was selected as the most suitable material for the test environment.