D85A-18推土机用NT855柴油机运行6400h后,由于水腐蚀、缸套孔阻水圈部分出现严重的洞孔和峰窝沙眼腐蚀带,长达488.5mm,宽达20mm,深度达0.5～2.5mm,形成的洞孔直径15mm,缸套孔内的冷却水由腐蚀带进入发动机油底壳内,机体达到了报废程度。我们采用电刷镀工艺修复,效果较好。(1) 表面清洗用汽油及钢刷反复清洗擦磨腐蚀带(洞孔及沙眼),去除锈层及油污。(2) 电静处理为进一步清洗腐蚀带,在汽油清洗后,利用刷镀机进行电净处理。镀笔 D85A-18 bulldozer with NT855 diesel engine running 6400h, due to water corrosion, cylinder block hole block part of a serious hole and pebble sand erosion zone, up to 488.5mm, width of 20mm, depth of 0.5 ~ 2.5mm, the formation of Hole diameter 15mm, cylinder liner hole cooling water from the corrosion zone into the engine oil pan, the body reached the scrap level. We use brush plating process repair, the effect is better. (1) surface cleaning with gasoline and steel brush repeated cleaning abrasion corrosion zone (holes and trachoma), remove rust and oil. (2) Electrostatic treatment In order to further clean the corrosion zone, after the gasoline is cleaned, it is electrically cleaned by a brush plating machine. Pen plating