超声波作用下常温磷化工艺的研究

介绍了一种不含任何有毒、污染环境的促进剂的碳钢表面超声波常温磷化工艺.探讨了超声波、及在超声波作用下磷化工艺参数,如温度、时间和pH值对所得磷化膜外观、膜重和耐蚀性的影响.结果表明:在超声波作用下,磷化液不加任何促进剂也能在碳钢表面实现常温磷化,而且所得磷化膜层均匀、致密,呈灰色;磷化膜层耐硫酸铜点滴时间可达到50～120 s,在3%NaCl溶液中产生锈蚀点的时间为4 h;磷化膜层与漆膜结合力好.

Study of Phosphating at Room Temperature with Ultrasonic

An effective metal finishing technology for obtaining phosphate coatings on A3 carbon steel by ultrasonic at room temperature was described.The phosphate electrolyte did not contain any poisonous and contaminative additives or accelerant.The effects of ultrasonic,phosphating parameters such as temperature,time and pH value on appearance,weight and corrosion resistance of the obtained phosphate coating were studied.The results show that the phosphate coatings can be obtained on the surface of A3 carbon steel at room temperature under ultrasonic wave without addition of any additives in phosphate solution.The phosphate coating obtained on A3 carbon steel is uniform and compact,and the color of the phosphate film is grizzly.During the cupric sulfate drop corrosion test,the withstanding time of the phosphate coating is 50-120 s.The occurring time of corrosion rust spot is 4 h on 3%NaCl solution immersion test.The adhesion force between phosphate coating and paint film is desirable.