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金属防锈剂有很多类,每一类又能许多种,下而介绍2类6种防锈剂的配制和使用方法.第一类:氧化剂 金属与氧或氧化剂反应所形成的氧化膜,可隔绝空气与金属,阻止其发生反应,具有防腐蚀作用.原料:氢氧化钠600g,亚硝酸钠150g,硝酸钠75g,水1000g.制法:把3种固体加入水中充分搅拌均匀即可.用法:将溶液加热至135℃,与金属作用的时间,根据其含碳量不同约为10min～90min.若用于电器内部零件,可在表面涂饰透明漆保护氧化层.第二类:磷化剂 磷化剂是针状均匀晶体,它不仅能防止金属腐蚀,而且能增强涂层与金属的附着力,因此常用作高档油漆的底层.磷化膜具有很高的绝缘性,一般能承受250V～300V电压,涂饰绝缘漆后可提高到1200V.耐热性可达400℃～500℃,耐寒性可达-75℃.
There are many types of metal rust inhibitors, each of which can have many kinds, the next introduces the preparation and use of two types of 6 kinds of rust inhibitors. The first category: oxide metal oxide film formed by reaction with oxygen or oxidant, Isolation of air and metal, to prevent its reaction, with anti-corrosion effect. Raw materials: sodium hydroxide 600g, sodium nitrite 150g, sodium nitrate 75g, water 1000g. System of law: the three solids added to the water Stir well. : The solution is heated to 135 ℃, the role of the metal time, according to its carbon content of about 10min ~ 90min. If used for internal electrical parts, the surface can be painted transparent protective oxide layer. The second category: phosphating agent Phosphating agent is uniform needle crystal, which not only prevents metal corrosion, but also enhance the adhesion of the coating and metal, it is often used as the bottom of high-grade paint. Phosphating film has a high insulation, generally can withstand 250V ~ 300V voltage, after finishing varnish can be increased to 1200V. Heat resistance up to 400 ℃ ~ 500 ℃, cold resistance up to -75 ℃.