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这方法可以增强钢板表面抗腐蚀性,延长使用寿命,比一般黑色油漆、纤维素涂层、漆片和其他类似涂层都耐用,寿命长而且不易脱落。应用也比较简便,价钱也便宜。钢板在处理之前必须进行脱脂,把带油污的钢板浸入苏打水中或采用喷砂方法,若表面油污不多也可省去此工序。溶液配制方法是:氢氧化钠100份,水100份,硫磺粉1份,磷酸5份。先把氢氧化钠溶解在水中再加入硫磺和磷酸,溶液加热一小时温度达121℃。把需要防锈的物件浸入溶液10到20分钟,溶液温度保持在127℃。浸入时间按物件厚度而
This method can enhance the corrosion resistance of the steel surface, extend the service life, than the average black paint, cellulose coating, paint and other similar coatings are durable, long life and easy to fall off. Application is also relatively simple, the price is cheap. The steel plate must be degreased prior to disposal, immersing the oiled steel plate in soda or sandblasting, and eliminating this process if the surface oil is small. Solution preparation method is: 100 parts of sodium hydroxide, 100 parts of water, sulfur powder 1 parts, 5 parts of phosphoric acid. First sodium hydroxide dissolved in water and then add sulfur and phosphoric acid, the solution was heated to an hour temperature of 121 ℃. The need to rust objects immersed in the solution for 10 to 20 minutes, the solution temperature was maintained at 127 ℃. Immersion time by the thickness of the object