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本文研制了一种以ε相为阴极保护,Ni-P合金为表面阳极保护的复层试样。用自行研制的多功能悬浮磨粒腐蚀磨损试验机,对阳极保护层和单层阴极保护试样进行一系列试验。试验结果及SEM、金相观察表明:单层阴极保护试样在磨损时,腐蚀起很大作用,并在腐蚀与悬浮磨粒磨损的共同作用下腐蚀磨损量很大。对于阳极保护复层试样,磨损特性及机理与复层间的界面结合状况有很大关系。当界面出现疏松时,易发生外层Ni-P合金破裂、剥落现象,同时磨损量以较快的速度增加。在最佳复层工艺下,复层界面里锯齿状,结合牢固,在悬浮磨粒腐蚀磨损过程中,主要是外层Ni-P合金层机械磨损、腐蚀所起作用甚微,复层的耐磨性良好。
This paper developed a kind of ε-phase cathodic protection, Ni-P alloy as the surface of the anode protection of the multilayer sample. A series of tests were carried out on the anode protection layer and the single-layer cathode protection sample by using the self-developed multi-purpose suspended abrasive corrosion tester. The results of the test and SEM and metallographic observation show that the single-layer cathodic protection sample plays a very important role in the erosion and the corrosion and abrasion loss are greatly affected by the combined action of corrosion and suspended abrasive wear. For the anode protection of the multi-layer specimen, the wear characteristics and mechanism are closely related to the interfacial bonding between the layers. When the interface appears loose, prone to the outer layer of Ni-P alloy rupture, spalling, while wear increased at a faster rate. In the best multi-layer process, the multi-layer interface jagged, combined with firm, in the abrasive wear and corrosion of suspended particles, the main outer layer of Ni-P alloy layer mechanical wear and tear, the role of corrosion is very small, Good grinding.