1. Between the coating and the base metal coating and the coating, there should be good adhesion;

2. The coating should be crystal fine, flat and even in thickness;

3. The coating shall have a specified thickness and as few pores as possible;

4. Coating should have the specified indicators, such as brightness hardness conductivity;

5. The plating time and the temperature during the plating process determine the thickness of the coating;

6. The input voltage is 220V 22V or 380V 38V;

7. The maximum working noise of water treatment equipment should be no more than 80dB(A);

8. Relative humidity (RH) should not be greater than 95%;

9. COD content of raw water is 100mg/L~150000mg/L.