Guanylthiourea in Metal Surface Treatment: Mechanisms, Applications and Advantages

The specific applications of guanylthiourea in metal surface treatment are as follows:

In terms of anti-corrosion
 Guanylthiourea can form a protective film on the metal surface. It can react with metal ions. For example, it can combine with the ions on the surfaces of metals such as iron and copper to generate a dense complex protective film on the metal surface. This film can prevent corrosive media like oxygen and moisture from directly contacting the metal, thus slowing down the corrosion rate of the metal.
- In some marine environments or industrial environments with high humidity, the anti-corrosion performance of metal materials such as steel components and copper equipment treated with guanylthiourea can be significantly improved, prolonging the service life of metal products.

In passivation treatment of metal surfaces
As a component of passivating agents, guanylthiourea can participate in the passivation process of metal surfaces. It can change the active state of the metal surface and turn the metal surface from an active state to a passive state. For example, in the surface treatment process of stainless steel materials, adding guanylthiourea can make the stainless steel surface form a more stable passive film, enhancing the corrosion resistance of stainless steel in some complex chemical environments (such as environments containing acidic or alkaline media).

Improving the coating performance of metal surfaces
After being treated with guanylthiourea, the metal surface has better wettability, enabling coatings to spread and adhere better on the metal surface. This is because it can adjust the physical and chemical properties of the metal surface, reduce the surface tension, make the subsequent coating process smoother, and make the bonding force between the coating and the metal surface stronger, reducing the phenomenon of coating peeling, thus improving the appearance quality and protective performance of metal products.