Electrophoretic Plating

We are Quzhou Chengji Coating from Zhejiang, China. With 16 years of experience in metal surface treatment, we present our star product. It is more than just a black paint; it is a smart solution to help your customers solve two big problems at once: rust and appearance. Many metal parts need both anti-rust protection and a shiny finish. Older methods were complex and caused pollution. Our coating acts as a strong "raincoat" against rust and also serves as a super-strong primer for parts that get plated. Think of it as a double layer of protection for metal. This is our promise to you.

Our 16 years of experience are reflected in this formula. We use top-quality epoxy resin and a special mixing method to create a smooth, milk-like liquid in water. The result is a coating with very low VOCs, under 80g/L, meaning almost no bad smell. It also meets stringent environmental regulations, ensuring that your products can be sold in Europe and the US without worry. Every batch is made to the ISO 22553 standard, so you get the same high quality every time. The product in the can is identical to the one we test in our lab, so you can trust that it will work well.

We don't just talk; we show results. A manufacturer of new energy car parts faced a significant problem. Their old coating lasted only 500 hours in the ASTM B117 salt spray test. After switching to our product, and with proper pre-treatment, the result was over 1,000 hours. That's a big improvement. For us, 720 hours without rust is just the starting point; we aim for 1,000 hours. This is real proof that our product will protect your metal parts for years, even in harsh outdoor conditions.

We know that parts are often bent or cut after coating. A coating that is too hard will crack, while one that is too soft will scratch. Our paint strikes the perfect balance. It has a hardness of 3H, similar to a pencil lead. It can withstand daily wear while remaining flexible. We conduct a 50 kg·cm impact test, dropping a weight from 50 cm high. The coating remains flawless, with no cracks. This means your workers can perform their tasks without damaging the finish, increasing your good parts rate.

Let's talk about cost. Traditional spray painting wastes a lot of paint, with only about 50% sticking to the part- the rest is wasted. Our process uses over 95% of the paint and uses water as a thinner. This reduces your paint and waste disposal costs. One of our clients, a manufacturer of screws and nuts, saw their cost per ton of product decrease by 20% after switching to our method. That's real profit. We want to be your technical partner and help you win larger customers who value quality.

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