What causes the paint on the valve surface to peel off? How to solve it? I need the master’s help!
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I would like to ask fellow sailors: how do you deal with the rust preventive oil and rust on the surface of your valves after conducting pressure tests on them? Should it be sprayed with a rust remover, or placed in a large tank with hot water to remove the rust? What preparations need to be done before spraying paint on the valves? And from after the painting is applied until the valves are shipped to customers overseas, could the paint on their surface peel off? I’m not in the technical field, but I really want to know about all these complicated sequences and processing methods. What’s the difference between sandblasting and shot blasting, and what are they used for? Is the cost very high? Is there a way to have it both ways – saving money while also ensuring that the paint doesn’t peel off?
Is this paint peeling caused by oil stains on the valve body surface?
1 Sandblasting 2 Primer Intermediate coat Topcoat. In some valve factories, the surface is sanded smooth and then painted three times. 3 After sandblasting and rust removal in a closed sandblasting facility, painting is carried out; attention should be paid to air humidity, and baking equipment is generally available. The requirements for the 4 outlets are very high. The specific requirements depend on the technical specifications in your contract or sample. Different companies and different **have different requirements. The differences between sandblasting and shot blasting can be found on Baidu. When exporting goods abroad, there are also customs quarantine inspections. How dare you save money!
How can the waterline surface of the valve and the valve stem be protected from damage caused by steel sand?
Wrap it with something. It’s not high-tech. Regarding the claim that the paint peels off after pressure testing – is that strange? Valve manufacturers usually conduct pressure testing first and only then apply paint.
If the surface treatment is not proper, the paint tends to peel off
If protection is implemented on a large scale, it seems both troublesome and wasteful! Is the method not correct?
【Reply to Floor 11】 Ideals are lofty, but reality is harsh. You definitely aren’t the boss, because you think too much