Guangzhou Small Sheet Metal Powder Spraying Factory, is there any environmentally friendly pretreatment liquid suitable for spraying?

Our factory is a listed company's sheet metal spraying equipment. Last year, because environmental protection did not allow drainage, we tested three-in-one phosphating, four-in-one phosphating and six-in-one phosphating of several enterprises.

I can answer you:

1. These phosphatings are all iron phosphating, not zinc phosphating.

2. Adhesion 100 bar or more, and a few of them can meet the standards of our factory.

3. Long-term stability is a key point. It is found that some enterprises can start testing at first, but the actual production will be unstable, and occasionally there will be problems such as hanging white ash and falling powder, which is puzzling. Their factory can't handle it, so they need to re-slot. Generally speaking, some companies can use this product, but we need to find a regular company with stable quality and reliable reputation. We have suffered a lot. Some enterprises seem very cheap, but the actual weight, concentration and quality are different every time.

The products of several factories are used in turn. Now Party B's environmental protection 3 oil-free phosphating solution has been used for more than half a year. Their products are concentrated solution, and the concentration and actual weight of each delivery are the same. After soaking in a pool, powder is sprayed on the line. Adhesion has always been ok, and their products are a little different from those of other manufacturers. They are slightly fragrant and employees prefer to use them. It's just that the price is not easy to cut Evaluate yourself and share what you find good.