It has always been a very difficult job to brush antirust paint for galvanized materials, because its material properties and stainless steel, the same general appearance paint is difficult to adhere to, the phenomenon of accidentally dropping the film, how to ensure that the paint film of special profile such as galvanized pipe is not easy to fall, will gradually develop into a problem of concern, The following will briefly introduce the coating and coating technology of Jinan galvanized pipe profiles, hoping to be helpful for the future coating work.
At present, there are two ways to use paint for galvanized pipe, one is to carry out phosphoric acid treatment for the appearance of galvanized pipe, the other is to use high adhesion paint, and the following treatment needs to be done before coating:
1. Phosphating treatment
The so-called phosphoric acid treatment is to use the phosphoric acid material on the surface of galvanized pipe for passivation treatment, so as to improve the surface roughness and adhesion of galvanized pipe. Phosphating treatment is more expensive, if conditions can be used.
2. Apply phosphating primer or high adhesion primer
Now there is a kind of phosphating primer on the market, similar to phosphating treatment, which can improve the roughness of galvanized pipe to a certain extent, and can use primer such as phosphating primer or directly use central paint.
For galvanized pipes, epoxy zinc phosphate primer and epoxy zinc yellow primer are generally selected, both of which are products with good coating adhesion. They are widely used in the bottom of galvanized pipes, stainless steel and other special materials. Before the paint construction, the galvanized pipes are ground and finely ground to prevent damage to the coated galvanized pipes themselves. The selection and treatment of substrate and paint are the key factors to prevent the corrosion of galvanized pipes.
The above is the relevant content introduced by Jinan galvanized pipe manufacturer. For more information, please visit the website: http://www.jnxxjm.com