电镀镍时最要紧的是注意电解液的酸度。我们建议的检查和校准酸度的快速方法,不需要特殊的设备,所以在我们工厂试验室和电镀车间里都使用这种方法。在20毫升滤过的电解液试样中,加0.5毫升0.06%溴甲酚紫的酒精溶液,当变成蓝色时,用0.1N的HCl滴定到这种颜色消失。我们在试验中确定:如果在上述条件下消耗2毫升的酸,则电解液中既不需加酸,也不必加碱。因为当镀槽被使用时,通常pH值增大,所以检查时几乎总是指出电解液的“校正”必须加酸,在每升电解液中,需要 The most important thing when electroplating nickel is the acidity of the electrolyte. Our proposed fast method of checking and calibrating acidity does not require special equipment, so it is used in our factory laboratories and electroplating plants. To 20 ml of the filtered electrolyte sample, 0.5 ml of a 0.06% bromocresol purple alcoholic solution was added and when it turned blue, the color disappeared with 0.1 N HCl. We have experimentally determined that if 2 ml of acid is consumed under the above conditions, neither acid nor alkali is required in the electrolyte. Because when the plating tank is used, the pH is usually increased, so the inspection almost always indicates that the “correction” of the electrolyte must be acid-added, per liter of electrolyte,