机床导轨和立柱上经常产生划痕,导致使用状态不良。大多数液压部件,经常产生划痕和擦伤,导致渗漏。各种发动机上的部件(如轴承座、机体孔、缸套与水套的结合部)由于振动和腐蚀,经常产生凹坑,导致失效。金属工件的上述损坏,可以采用涂镀锡的方法迸行修复。这种维修方法具有一系列优点:(1)镀层与基体金属结合牢固,不易产生剥离或起皮; Machine tools and rails often lead to scratches, resulting in poor use of state. Most hydraulic components, often scratches and scratches, resulting in leakage. Components on various engines (such as bearing housings, body bores, joints between liner and water jacket) often create pits due to vibration and corrosion, resulting in failure. The above-mentioned damage to metal workpieces can be repaired by tin-plating. This maintenance method has a series of advantages: (1) the coating and the base metal are firmly bonded, and the peeling or peeling is not easy to occur;