电沉积Zn-Fe合金的渗氢行为研究 关键词： 三价铬；黑色钝化；发黑剂；磷酸盐；锌镀层 [gap=685]Key words：trivalent chrome；black passivation；blackening agent；phosphate；galvanized coating
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The bath compositions of trivalent chrome black passivation for zinc-iron alloy coating were optimized by orthogonal test method.
采用正交试验法对锌-铁合金镀层三价铬黑色钝化工艺进行优化，并研究了工艺参数对钝化膜外观和耐蚀性等影响。
Hexavalent chrome is reduced to trivalent chrome by morpholine under high temperature conditions. Then morpholine content is calculated by detecting the absorbance of trivalent chromic ion.
吗啉在高温下将六价铬还原为三价铬，通过测定三价铬离子的吸光度，计算出锅炉给水中吗啉含量。
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