How to Prevent Metal Parts Corrosion Issues
As one professional CNC machining manufacturer, Creatingway always face various shapes and size of metal parts and plastic parts for mass production every day. When we have machined them perfectly, whether it will mean the parts finished, in order to the maintenance of the parts after production, if you have further considered the part finishing or coating to prevent surface before production and packaging.
If so, somebody asked us how to prevent metal parts from corrosion issues? Today, Creatingway will mainly share: “several tips to prevent metal parts corrosion issues. By these learns, you will have a certain knowledge for the corrosion problems, and also will clearly recognize the importance of surface treatment for your metal parts, so both can make them perfectly appearance.
What Is Metal Parts Corrosion?
It is a chemical reaction, when iron in a metal surface reacts with an element in the environment, commonly oxygen and water, thus causing the metal to be broken down.
Why Do Metal Parts Cause Corrosion Problems?
Usually, for many commonly engineering metal materials, like stainless steel, aluminum, and other passive metals when they are used in produced, the surface protective film of the parts will be broken so that the corrosion protection is invalid.
On the contrary, when these metal parts are not contaminated, they will have a thin oxide film on the surface of the parts to prevent corrosion. This also will mean that the surface of the metal parts remains pure and not be contaminated.
How Galvanizing Prevents Metal Parts From Corrosion?
The zinc of coating and the iron of steel strip can form the battery in the moist environments, because of the zinc standard electrode potential is only -1.05V, which is lower than the iron -0.036V, so the zinc as the anode oxidation, the iron as the cathodic protection.
When the surface of the metal part has a thin layer the zinc coating, the corrosion resistance increased significantly. At the same time, it can effectively save materials and resources, and obtain good economic benefits and environmental benefits.
How Passivation Prevents Corrosion
Passivation is one main surface treatment, it’s used to improve the corrosion resistance of metal parts.
Passivation is a chemical process intended to return contaminated metal parts to their original, and remove some irons and other contaminants from the surface of the metals, thus protect the metal parts are corroded.
How Polishing Prevents Metal Parts Surface?
In general, polishing had been described as a “reverse plating” process. When plating involves coating on the outer surface of the parts with a thin layer of metal. However, polishing is removing this a thin layer of metal from the part’s surface, thus increasing the corrosion resistance.
Polishing is a better method of surface treatment than Passivation. When passivation can remove surface contaminants from stainless steel parts and increase corrosion resistance, the polishing not only can remove some iron and other contaminants but also eliminate imperfections on the surface of metal parts.
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