Pure Process Of Carbon Salt

More than 90% of the metal used by people is steel. However, about 10% of the existing steel and metal equipments were corroded every year, leading to serious economic losses [1]. Q235, which is one of the largest amount of basic materials in industry, has a good overall performance. Unlike carbon, Cu, Al, stainless steel and other metals who can be self-passivation in the environment, Q235 is prone to corrosion among humid atmospheric environment or in solution. Therefore, the study of corrosion and protection of carbon steel is significant. Coating is an effective and commonly used technique for protecting steel materials. A complete metal protective coating system, mainly includes the surface pretreatment layer and the protective coating layer. Traditional surface pretreatment technology is the chromate and phosphate conversion treatment [2]. Moreover, there are some new surface pretreatment technologies such as molybdate, titanate, phytic acid, tannic acid, organic silane, rare earth passivation [3]. Rare earth passivation and silane passivation have attracted attention and have good prospects in recent years due to their non-