By understanding the principle or mechanism of silane treatment agent, we can understand how silane treatment agent can prevent metal surface from corrosion. Speaking of the anticorrosion mechanism, the principle of silane is different from that of chromium passivation. The working principle of chromium passivation is to change the electrochemical properties of the oxide layer on the metal surface to prevent metal corrosion. The working principle of silane is not to directly affect the properties of metal oxide layer, mainly to control the corrosion point to prevent metal corrosion. Let's take huiweijia Xiaomei as an example.

Next, Xiaomei takes aluminum as an example. The corrosion of aluminum surface starts from an original corrosion point, which we usually call "corrosion point", and the corrosion point will produce the corrosion medium to diffuse around. Corrosion medium (diffusion rate) controls the growth rate of corrosion point, and they complement each other. The wider the diffusion of corrosion medium, the wider the corrosion area of aluminum. In other words, if the corrosion medium accumulates at the corrosion point and does not diffuse, it will cause the corrosion point to be passivated again by silane, thus terminating the corrosion process.


After the surface of aluminum is treated by silane, because the interface layer of silane and the metal surface are closely combined, the corrosion medium produced by the corrosion point is firmly covered under the interface layer and cannot move and diffuse, so that the silane treatment has time to repair and passivate again, so as to prevent the metal corrosion.