通过测量磷化时电位-时间曲线,分析NO_2~-、F~-离子对成膜的影响,并结合耐蚀试验和磷化膜的形貌观察,得到磷化性能较好的室温磷化......

In this paper, a procedure of pyrohydrolysis-spectrophotometric determination has been estahlished for chlorine in ores ......

采用催化转化法由天青石制取粗品SrCO3,经酸溶后采用综合净化法除去钡、钙等杂质,用碳铵与之作用生成高纯SrCO3成品.本方法具有转......