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发黑剂|钢铁发黑剂|铜发黑剂|常温发黑剂

发布日期:2019-01-10 浏览次数:6

发黑剂的注意事项

羽杰科技发黑剂.jpg

1:常温发黑剂浓度过高时,成膜速度快,膜层较疏松,结合力不好:浓度过低,发黑速度慢。不同材料由于表面活性不同溶液含量也应不同

      when the concentration of room temperature blackening agent is too high, the film forming speed is fast, the film layer is loose, and the binding force is not good: the concentration is too low, and the blackening speed is slow. Different materials should have different solution content due to different surface activity


2:PH值是影响发黑效果的一个最重要参数,PH值过高,成膜速度慢,甚至不能发黑成膜,PH值过低,则反应速度过快,结合力不好,而且随PH值进一步减低会容积生成的膜层。PH值一般控制在1.5-2.5之间,必要时可用硝酸或氨水调整

     pH value is one of the most important parameters affecting the blackening effect. If the pH value is too high, the film forming speed is slow, and even the film cannot be blackened. If the pH value is too low, the reaction speed is too fast, the binding force is not good, and the volume of the film will be generated with the further reduction of pH value. The pH value is generally controlled between 1.5-2.5, and can be adjusted with nitric acid or ammonia water if necessary.


3:温度低于10°时反应速度较慢,黑度和均匀性差,此时应延长反应时间。当温度大于40°时,反应速度过快,结合力差,故温度一般控制在15°-35°。

     when the temperature is lower than 10 °, the reaction speed is slow, and the blackness and uniformity are poor. At this time, the reaction time should be extended. When the temperature is more than 40 °, the reaction speed is too fast and the binding force is poor, so the temperature is generally controlled at 15 ° - 35 °.


4:发黑时间一般3-10min,若时间段,则膜成长不完全,膜层过薄,有花斑:若是发黑时间过长,则表明会过多地为黑色氧化物,多余部分疏松,结合力不好。

    the blackening time is generally 3-10min. If the time period is too long, the film will not grow completely, the film will be too thin, and there will be spots. If the blackening time is too long, it means that there will be too much black oxide, the excess part will be loose, and the binding force is not good.


5:钢铁常温发黑工艺流程包括前处理、发黑、后处理3个部分:化学除油-热水洗-冷水洗-酸洗-冷水洗-冷水洗-发黑(可2词发黑)-水洗-水洗中和-水洗-浸油封闭

      the normal temperature blackening process of iron and steel includes three parts: pretreatment, blackening and post-treatment: chemical degreasing, hot water washing, cold water washing, acid pickling, cold water washing, cold water washing, blackening (can be blackened in two words) - water washing, water washing and neutralization, water washing and oil soaking.


6:除油:除油是关键,工件上油污未彻底出掉,酒水直接影响发黑的质量,出现花斑或者发黑膜结合力差深圳不能上色。

    oil removal: oil removal is the key. The oil stains on the workpiece are not completely removed. The liquor directly affects the quality of blackening. If there are spots or the binding force of blackening film is poor, it cannot be colored in Shenzhen.

羽杰科技铜发黑剂效果图.jpg

本文标题:发黑剂|钢铁发黑剂|铜发黑剂|常温发黑剂 原文链接地址:http://www.fangxiuoil.com/show.asp?id=10

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