摘要
介绍了一种超声波-黑磷化无硒常温发黑工艺,其发黑液配方及操作条件为:25 g/L的Zn(H2PO4)2·2H2O,40 g/L的 Zn(NO3)2·6H2O,适量NaNO2,温度25～30 ℃, pH 2.5, 时间30 min, 超声功率为200 W.通过比较磷化(伴随超声作用)后无硒常温发黑(伴随超声作用)、无超声作用下磷化后无硒常温发黑、在磷化发黑混合液中进行磷化发黑(有或无超声作用)4种实验方案,结果表明第一种实验方案制得的膜层综合性能最佳,室外放置6个月仍然乌黑、无锈蚀,且耐磨性较好.扫描电镜图显示,该膜层结构致密,表面微裂纹细小,黑度大.EDS分析表明该膜层主要由Fe, Cu, S, O, Zn, P等化学元素组成.
A process of ultrasonic-black phosphating non-selenium room temperature blackening was introduced, with its formula and operation conditions being as follows ： 25 g/L of Zn （ U2PO4）2·2H2O,40 g/L of Zn （ NO3 ）2·6H2O, suitable content of NaNO2, temperature of 25 - 30℃, pH of 2.5, time of 30 min,ultraonic power of 200 W. Four test schemes were compared, which are ultrasonic non-selenium blackening at room temperature following ultrasonic phosphating, non-selenium blackening at room temperature following phosphating, ultrasonic phosphating and blackening in mixed solutions for phasphating and blackening. The results show that the film obtained by the first scheme mentioned a- bove has the best comprehensive performance without rust after being kept out of room for 6 months and having good wear resistance. SEM photos reveal dense structure, fine and small micro-crack and deeply blackened film. EDS analysis demonstrates that the film is mainly composed of Fe, Cu, S, O, Zn, P, and other elements.
出处
《电镀与涂饰》
CAS
CSCD
2005年第12期12-14,共3页
Electroplating & Finishing
关键词
常温发黑
磷化
超声波
无硒
blackening at room temperature
phosphating
ultrasonic
non-selenium
