锰系磷化工艺在工程机械液压多路阀上的应用

Application of Manganese Phosphating Process on Hydraulic Multiway Valve of Construction Machinery

液压多路阀的抗锈蚀能力,是保证液压系统正常工作的一项重要指标。该文针对工程机械液压多路阀的防锈问题,引入锰系磷化技术,通过对比试验的方式选择合适的工艺达到良好的防锈效果,首先提出了两种关键技术,即锰系磷化防锈技术、附着力提升技术;然后对锰系磷化与锌系磷化进行了对比;最后指出了锰系磷化工艺在工程机械液压多路阀上应用的三点创新点,一是磷化工序安排的先后顺序设置;二是磷化前工艺尺寸的预留量分配;三是磷化膜厚度均匀性控制。

The corrosion resistance of hydraulic multi-way valve is an important index to ensure the normal operation of hydraulic system.In this paper,aiming at the problem of anti-rust of hydraulic multi-way valve of construction machinery,the technology of manganese phosphating is introduced,and the good anti-rust effect is achieved by comparing the methods of testing.First,two key technologies are put forward,namely,anti-rust technology and adhesion enhancement technology of manganese phosphating system.Then the phosphating of manganese and phosphating of zinc were compared.Finally,it points out three innovative points of application of manganese phosphating process on hydraulic multiway valve of engineering machinery.The first is the sequential arrangement of the phosphating process.The second is the reserved amount distribution of the process size before phosphating;The third is the phosphating film thickness uniformity controlled.