Equipment: high-efficiency pulse spray gun, such as Jinma or Nuoxin or Wagner spray gun; Good grounding requires grounding resistance less than or equal to 2 megohms.
Raw materials: use powder coatings from well-known manufacturers. Some cheap powders often contain a certain amount of recycled powder (worse, grinding powder), which leads to too wide particle size distribution and serious Faraday effect.
Correct construction technology:
A. Sequence: For inner cavities or dead corners, manual spraying should be carried out before large-area mechanical spraying, rather than after large-area spraying.
Process parameters: low flow rate, low air pressure and low spraying voltage.
Management: train operators, use skilled operators and strengthen process discipline inspection.
Pre-quality planning: For workpieces with exposed cavities and dead corners or used outdoors, it is best to design them from the structural point of view first. If the structure cannot be changed, in this case, it is best to use cathodic electrophoretic coating in advance, and then powder coating or direct electrophoretic coating can be carried out if the quality can meet the requirements.
The above scheme is for your reference.