Why are special-shaped parts such as bolts and flanges not suitable for paint-based anti-corrosion treatment
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May I ask, in terms of corrosion protection for complex-shaped parts, in what ways are mineral oil-based coatings superior to paint?； What are the shortcomings of traditional paint anti-corrosion methods?
The question doesn’t match; I will only answer the title: Why are special-shaped parts such as bolts and flanges not suitable for paint-based anti-corrosion treatment? When bolts are painted, their threads are essentially covered, making it difficult to remove them. The flange can be painted, except for the sealing surface.
Hello, thank you for the information. I have a question: 1. Why can’t paint be applied to the sealing surface? 2. How can irregular-shaped parts be better protected against corrosion? I am in contact with mineral ester tape products and would like to know which anti-corrosion method is more suitable. Thank you
1. Paint on the sealing surface undermines the sealing effect. 2. I don’t know.
Bro, does anyone who knows know about this? Could they help ask around? Also, why does paint crack and rust easily at the corners?
It’s a good idea to apply some butter to the bolts, as it can help prevent rusting to some extent.
It evaporates quickly, it’s sticky and grayish, and I have to keep dealing with it
The flange surface can also be painted; after sandblasting, it can be coated with zinc powder paint. The paint layer is thin, so it does not affect the sealing performance. As for bolts, painting them is not advisable because there is a risk that the coating could accumulate on the thread ends. In applications where higher standards are required, bolts that have undergone Dacromet surface treatment, that is, blackened bolts, are used.
Flange connections can use PTFE gaskets
Hello, our company specializes in pressure-based leak sealing, on-site mechanical processing, and anti-corrosion treatment for equipment and pipelines. If you have any needs, we can communicate and exchange ideas on this matter. Phone number: 18188415137
The flange sealing surfaces of some equipment or pipelines are not allowed to be painted, due to reasons related to the internal medium.