中温锌-钙系黑色磷化膜的耐蚀性能  

Corrosion Resistance of Black Phosphating Coating of Zn-Ca System at Medium Temperature

作　　者：仝晓刚[1] 陈琳[1] 罗宏[1] 赵蛟[1] 

机构地区：[1]四川理工学院材料与化学工程系,四川自贡643000

出　　处：《材料保护》2009年第3期39-40,53,共3页Materials Protection

摘　　要：黑色磷化膜的耐蚀性、微观结构和组成成分的系统研究相对较少。为了获得耐蚀性能较好的中温锌-钙系黑色磷化膜,从游离酸度(FA)、温度、时间等方面考察了黑色磷化膜的耐蚀性,通过扫描电镜、X射线衍射分析对膜层的性能进行了表征,测试了黑色磷化膜层的电化学极化性能。结果表明:当黑磷化液的游离酸度为4～10点,温度为60～75℃,时间为10～20min时,黑色磷化膜层的耐腐蚀性较好;黑色磷化膜的腐蚀电位比Q235钢基体高0.2313V。Black phosphating coating with superior corrosion resistance was prepared from a Zn-Ca sys-tem at medium temperature. The factors such as free acidity,temperature and phosphating time on the corrosion resistance of the black phosphating coating were investigated. The microstrue-ture and phase composition of the black phosphating coating were analyzed by means of scanning electron microscopy (SEM) and X -ray diffraction (XRD). And the potential -time curve of the coating was measured as well. Results show that the black phos-phating coating obtained at a free acidity of 4 ～ 10,phosphating time of 10 ～20 min,and temperature of 60 -75℃ had good cor-rosion resistance. And the black phosphating coating had a corro-sion potential higher by 0. 231 V than that of Q235 steel.

关 键 词：黑色磷化 锌-钙系 中温 耐蚀性 

分 类 号：TG1748[金属学及工艺—金属表面处理]