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将重金属离子及高价金属离子盐引进到“三合一”磷化液中的SP－15处理剂，使非水洗磷化膜的干燥速度快，且其室内防护期可达2个月。本文介绍了SP－15的基本成分，并推荐了适用于三种表面状态的处理工艺。
The introduction of heavy metal ions and high-priced metal ion salts into the “triple” phosphating solution SP-15 treatment agent, the non-washed phosphate film drying speed, and the indoor protective period of up to 2 months. This article describes the basics of SP-15 and recommends a process that is suitable for three surface conditions.