Posted on 2015-11-16 With further research, people realize dacromet technology is not absolutely green and pollution-free technology,there are other drawbacks.
1.The problem of pollution: Dacromet solution of chromic acid content is very high, in the process of preparation and use of people will inevitably come into contact with it, using the containers and equipment will inevitably be contaminated, into film early on in the process, it will inevitably with the evaporation of water vapor (from chromium plating experience to), so the prepared from solution to produce coating process to do no gas, liquid and solid hazardous substances emissions very difficult, or environmental protection equipment investment is very large. Again, when the coating corrosion has again Dacromet damage, six chromium in the coating film will release. Hexavalent chromium to human toxicity and carcinogenicity are very strong, at present many countries of hexavalent chromium has very strict standards limit and even prohibit the use of. Therefore,it has become an insurmountable barrier to Dacromet.
2.Higher sintering temperature,larger energy consumption.
3.The surface hardness and wear resistance is not good,there are still contacts galvanic corrosion problems and dissimilar metals,affecting the product surface quality and anti-corrosion performance.
Post time: Jan-13-2022