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化学镀镍常见的问题排除方式
来源:http://www.jnjrh.com 日期:2019-10-02 发布人:admin
毛病现象
 
Fault phenomenon
 
剖析及处理办法
 
Analysis and Treatment
 
镀层暗淡,不平均
 
The coating is dim and uneven.
 
① 溶液中主盐与复原剂比例失调,剖析调整
 
(1) Disequilibrium of the ratio of main salt to restoring agent in solution, analysis and adjustment
 
②溶液被其他杂质污染,致使反响中毒,电解处置
 
(2) Solution contaminated by other impurities, resulting in reaction poisoning and electrolytic disposal
 
反响看似猛烈,呈现很多气泡,但沉Ni较少或不堆积,外表发灰
 
The reaction seems fierce, showing a lot of bubbles, but less or no deposition of Ni, gray appearance.
 
pH值偏高,复原剂用于析氢,放出很多,调整镀液pH值
 
The pH value is on the high side. Restoring agent is used for hydrogen evolution, releasing a lot, adjusting the pH value of plating solution.
氨基磺酸
 
镀层色泽不分歧
 
The colour of the coating is not different.
 
① 拌和强度太大且不平均;
 
The mixing strength is too high and uneven.
 
②基体外表资料不分歧
 
(2) Matrix appearance data do not differ.
 
堆积速度低,反响较慢或不反响
 
Low stacking speed, slow response or no response
 
① 镀液pH值太低,用或NaOH调整;
 
The pH value of plating solution is too low to be adjusted by NaOH or NaOH.
 
②镀液温度偏低,调整;
 
(2) The plating bath temperature is on the low side and adjusted;
 
③主盐及复原剂缺乏,浓度低,调整
 
(3) Lack of main salt and restorer, low concentration, adjustment
 
溶液反响猛烈,外表呈现暗灰色沉淀物
 
The solution reacted violently, showing dark grey sediments on the surface.
 
① 镀液pH值偏高;
 
The pH value of plating solution is on the high side.
 
② 入槽工件太多或太少且不平均;
 
(2) too many or too few and uneven grooved workpieces;
 
③工件彼此触摸,发作镍颗粒固体;④有金属颗粒带入,过滤除掉
 
(3) Workpieces touch each other and nickel particles are solid; and (4) metal particles are brought in and filtered out.
 
调整pH值时,溶液呈现很多白色牛奶状沉淀物
 
When adjusting the pH value, the solution presents a lot of white milk-like precipitates.
 
加碱太急不平均且没有拌和。加l0%硫酸溶液调整至正常
 
Alkali addition is too urgent and uneven, and there is no mixing. Adjust to normal by adding l0% sulfuric acid solution
 
镀层起皮,有鱼鳞状,镀层粗糙和针孔
 
Coating is scaly, rough and pinholes.
 
① 工件触到槽底或离槽壁太近(<1cm,有阳极维护时)
 
(1) The workpiece touches the bottom of the groove or is too close to the groove wall (<1 cm, with anode maintenance)
 
② 有反响气泡阻滞在零件外表,要增强搅
 
(2) Responding bubbles are blocked on the exterior of the parts, so stirring should be strengthened.
 
③前处置不良,增强前处置;
 
(3) Poor pre-disposal and enhanced pre-disposal;
 
④镀液温度改动大,pH值改动大,留意温度和
 
(4) The bath temperature changes greatly, the pH value changes greatly, pay attention to the temperature and temperature.
 
pH值的操控
 
Control of pH Value