三价镍的

According to AAS data, Fe, Ni and Mn in pits dissolved into ions in form of divalence, and Cr in form of trivalence both in the presence and absence of PD.

结果表明：304不锈钢蚀孔内，铬元素以三价，铁、镍和锰以二价离子形式溶解，缓蚀剂PD不改变各元素溶解的价态。

Since xylenol orange interferes to determine some metal ions, such as iron, nickel, the author researched to determine them using EDTA.

6对二甲酚橙有封闭作用的金属离子如三价铁、镍，本文研究了用EDTA法测定它们的方法。

The colors of barrel plating are :triatomic chromiumblue/white/colorful/black zinc, chromium with a valence of sixblue/white/colorful/black zinc, pure copper, bright nickel, chemical nickel ,black nickel ,bronze, chromium and so on; the colors of the rack plating are : triatomic chromiumblue/white/colorful/black zinc, chromium with a valence of sixblue/white/colorful/black zinc, pure copper, bright nickel, chemical nickel ,black nickel ,bronze, chromium and so on.

随着市场发展需要，公司电镀生产线迁入博罗县石湾镇，投资设立金城五金电镀厂，总面积 9000平方米，专业加工电镀各种螺丝、五金件，设备齐全，实力雄厚，滚镀的颜色有：三价铬兰/白/彩/黑锌、六价铬兰/白/彩/黑锌、红铜、亮镍、化学镍、枪黑镍、青铜、青古铜、铬等不同颜色，挂镀的颜色有：三价铬兰/白/彩/黑锌、六价铬兰/白/彩/黑锌、红铜、亮镍、化学镍、枪黑镍、青铜、青古铜、铬等颜色，镀种齐全，月生产能力可达 800 余吨。

While high quality deposition from trivalent chromium electrolyte could only be sustained for short periods and thin deposits obtained of decorative value only, it is difficult to substitute heaxvalent chromium plating in engineering electrodeposits by trivalent chromium plating at all.

因此，本文在电沉积出镍-铁合金纳米晶的基础上，采用脉冲电沉积的方法研究了在三价铬体系中获得纳米晶铬和铬-镍-铁合金纳米晶厚镀层的工艺及其基础理论，以期解决三价铬镀液完全代替六价铬电镀的难题。

The company in Singapore, Germany, Japan and other countries of the plating process technology, with professional technical staff to provide you with electroless nickel plating, electroplating, silver, copper, zinc, chromium, copper alloys, and Sn-Zn ternary alloy trivalent chromium oxide such as surface treatment services.

本公司采用新加坡，德国，日本等国家的电镀工艺技术，配备专业的技术人员，为您提供化学镀镍，电镀银，铜，锌，铬，铜锡锌三元合金以及铝合金三价铬氧化等表面处理服务。

Mainly engaged in plastic plating technology research, development, production and processing, the company's main products are copper, bronze plating, nickel, nickel-plated black, and the plating of trivalent chromium 6 Trivalent chromium, and so on.

永翔五金塑胶有限公司主要从事塑胶电镀技术的研究、开发、生产及加工，目前公司主要产品有镀铜、镀古铜、镀镍、镀黑镍、镀三价铬及六价铬等。

By the time of its fall, most of the prisoners were writers who had written against the corruptions of the government.

到它被攻陷的时候，里面多数的犯人是写了反对政府贪污文章的作家。

The most obvious variation to ovum morphological character was that the color was changed from light green to sepiaceous in embryonic development, and all the ovums were almost hatched after 96h.

在胚胎发育过程中卵的形态特征最明显的变化是颜色从淡绿到深褐色，卵在发育96h后卵基本全部孵化。