It’s true.
The advantages of graphene coatings are mainly reflected in the field of anti-corrosion. In this field, it is strictly called graphene zinc powder coating. To understand graphene zinc powder coating, you must understand the two products of zinc-rich primer and graphene. .
Zinc-rich primer is an anti-rust primer commonly used in the field of anti-corrosion. Zinc-rich primer is sprayed on the surface of the substrate that has been sandblasted and shot blasted. Iron and zinc are cathodes and anodes to each other, forming a corrosive In micro-battery units, zinc has a low potential and preferentially corrodes zinc, but zinc is more difficult to corrode than iron and plays a role in cathodic protection.
Extended information:
Graphene zinc powder coating has strong cathodic protection performance:
The yoke structure of graphene gives it high electron mobility , added to the zinc powder coating, ensures good electrical conductivity between zinc powders, and at the same time maintains full electrochemical contact with the steel substrate that has been sandblasted and shot blasted to form a conductive network.
When corrosion occurs, zinc ions migrate to the graphene surface of the cathode as carriers. The probability of forming insoluble zinc salt deposits on the surface of the metallic zinc particles is reduced. The zinc powder can function for a long time, and the zinc powder is also used. Make full use of it to provide better electrochemical protection.
At the same time, we use higher purity zinc powder to reduce the lead, iron, cadmium, and zinc oxygen compounds in the zinc powder to very low levels, which is more conducive to exerting cathodic protection performance.
Graphene zinc powder coating has a flaky shielding effect.
Since graphene is a flaky structure, it can form a labyrinth effect in the coating. Other shielding fillers: aluminum powder, mica powder, glass flakes and graphene are incomparable.