To improve the wear and corrosion resistance of key components and ensure the safe operation of offshore equipment, we applied an ∞ oscillating laser to prepare a TiAlSi-Ni composite coating. The effects of Ni addition on the composition, microstructure, corrosion resistance and mechanical properties of the coating were experimentally investigated. The results showed that the coating mainly presented an interdendritic - dendritic structure, and the S4 coating with 17 at% Ni had the best wear and corrosion resistance. In the reciprocating sliding friction and wear test at 10 N and 30 N, the wear rates were 0.83 and 1.66 × 10 mm·N, respectively, which is 1/5 and 1/3 of TC4 under this load. The S4 also had the largest passivation interval and passivation film stability. The internal and external double-layer film structure ensures that it is not corroded by corrosive medium. The TiAl/TiNi semi-coherent interface and lattice distortion gave the TiAl-TiNi and TiAl-TiNi eutectic interfaces a high bonding strength. Moreover, the “labyrinth effect” produced by the lamellar eutectic structure further improved the corrosion resistance. This work provides a new method for obtaining coatings with high adhesion and wear and corrosion resistance for offshore platforms.

中文翻译：

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∞振荡激光熔覆TiAlSi-Nix(x=0、5、11、17、23at%)多主成分合金涂层的耐磨蚀性能


为了提高关键部件的耐磨性和耐腐蚀性能，保障海上设备的安全运行，我们采用∞振荡激光制备了TiAlSi-Ni复合涂层。实验研究了Ni的添加对镀层成分、显微组织、耐蚀性和力学性能的影响。结果表明，涂​​层主要呈现枝晶间-枝晶结构，其中含17 at% Ni的S4涂层具有最佳的耐磨性和耐腐蚀性能。在10 N和30 N的往复滑动摩擦磨损试验中，磨损率分别为0.83和1.66×10 mm·N，分别是该载荷下TC4的1/5和1/3。 S4还具有最大的钝化间隔和钝化膜稳定性。内外双层膜结构保证不受腐蚀性介质的腐蚀。 TiAl/TiNi半共格界面和晶格畸变使TiAl-TiNi和TiAl-TiNi共晶界面具有较高的结合强度。而且，层状共晶组织产生的“迷宫效应”进一步提高了耐腐蚀性能。该工作为海上平台获得高附着力、耐磨损、耐腐蚀的涂层提供了一种新方法。