论文部分内容阅读
为适应阳离子电泳涂漆的底层要求,美国研究出一种先浸后喷淋的金属表面磷化处理新工艺。这项工艺是,先将金属表面浸入一种酸性磷化液中(含有锌离子、磷酸根离子和少量的亚硝酸根离子和芳族硝基化合物),液温40～70℃,浸渍时间在15秒以上,然后用相同的溶液,以同样的温度,喷淋2～60秒,即可得到均匀细密的磷化膜,膜的重量轻,具有良好的结合力和耐蚀性。
In order to meet the requirements of the cationic electrophoretic coating of the bottom, the United States developed a kind of first after the dip spray metal surface phosphating new technology. The process is to first soak the metal surface into an acid phosphating solution (containing zinc ions, phosphate ions and a small amount of nitrite ions and aromatic nitro compounds) at a liquid temperature of 40 to 70 ° C for an immersion time of 15 seconds or more, and then use the same solution, the same temperature, spray 2 to 60 seconds, you can get even and fine phosphate film, the film light weight, with good adhesion and corrosion resistance.