提出钢筒磷化产生的水流痕迹,是氧浓差电池电化学腐蚀.当磷化产品先行整体浸FQ-503C清漆,烘干可解决产品1/2刷漆、烘烤、再浸漆迅速出现水痕锈蚀的问题.认识这种滞缓作用意义很大,可以避免对零件预处理的过高苛求,并对涂料及其施工改革给予更大重视. Proposed steel cylinder phosphating traces of water flow, is the oxygen concentration of the battery electrochemical corrosion. When the phosphating product first overall dip FQ-503C varnish, drying can solve the product 1/2 paint, baking, then dipping rapid The problem of corrosion of water marks.It is of great significance to recognize this stagnation effect, to avoid excessive demands on the pretreatment of parts, and pay more attention to coating and construction reform.