黑色复合耐磨磷化膜的摩擦学性能

Friction and Wear Behavior of Black Composite Phosphating Coating

复合磷化膜耐磨性较好,但研究报道较少,因而其推广应用受到了限制。按磷化的成膜机理,设计优选出了耐磨复合磷化液配方、最佳磷化工艺,制备出复合磷化膜并通过摩擦试验检测磷化膜的摩擦学性能。结果表明:复合磷化膜呈黑色、细密针孔状结构;复合磷化膜能显著提高摩擦副表面的摩擦学性能,摩擦系数从0.8降到0.3;磷化前的表面调整有利于形成细密、性能好的磷化膜;磷化作为喷涂固体润滑剂的前处理,能提高固体润滑涂层的持久性。

By taking into account the film-formation mechanism phosphating coatings,the bath for the preparation of composite wear-resistant phosphating coating was designed and used to prepare the titled phosphating coating based on optimization of the processing parameters. The friction and wearbehavior of the composite phosphating coating was evaluated using a friction and wear tester. Results show that the targeted composite phosphating coating was black and had compact needle-hole-like morphology. It was capable of significantly improving the wear re-sistance of the substrate and decreasing the friction coefficient from 0. 8 to 0. 3. Moreover,it was feasible to improve the quality of the phosphating coating by properly adjusting the surface before phos-phating. And phosphating could be well used to improve the en-durance of solid lubricant coatings.