What are the advantages and precautions of epoxy zinc-rich primer?

Speaking of epoxy zinc-rich primer Most readers may find it unfamiliar. They don't know anything about it. In fact, it has been widely used. In order for more people to understand it, let's talk about the advantages of epoxy zinc-rich primer and the matters needing attention during construction. I hope all friends will take a look.

epoxy zinc-rich primer However, judging from its name, many people don't know what it is. In fact, it is composed of zinc powder, epoxy resin, solvent and auxiliary agent. The zinc powder plays a major role in rust prevention and corrosion protection. It has many advantages, the most obvious of which is its cathodic protection effect. According to the electrochemical corrosion protection mechanism, it can better protect steel during use, and it also has a corrosion inhibition effect. Because the zinc powder inside reacts chemically with the corrosive medium to produce zinc salt, its properties become very stable, and its structure is very compact. This can block corrosion, and its salt spray resistance is also very strong, because the higher the zinc content, the stronger the salt spray resistance. These are its advantages.

epoxy zinc-rich primer After knowing its advantages, we also need to understand some matters needing attention during construction. When using epoxy zinc-rich primer, the steel must be sandblasted and reach the Sa2.5 derusting standard, and the roughness must reach 30-70μm. When using the topcoat and curing agent, it is necessary to strictly follow the ratio of addition, and it is also necessary to use it up within the specified time. During construction, the temperature should be controlled at 5-40℃, and the temperature of the substrate should be 3℃ higher than the dew point temperature. When the interval between the primer and the next coat of paint is more than 7 days, the primer needs to be roughened, and the zinc salt on the surface should be cleaned. Construction personnel must avoid contact with acids and alkalis.