Increased corrosion resistance of the piston rod surface

How to improve the corrosion resistance of the piston rod surface?

The piston rod is a connecting part widely used in most mechanical products at present. However, due to the harsh environment of some mechanical applications, there are relatively high requirements for the corrosion resistance of the piston rod. So how should we improve the corrosion resistance of the piston rod surface?
Methods of improving the corrosion resistance of the piston rod surface:
1. Rolling processing:
Through rolling forming, a layer of cold work hardening layer is formed on the rolling surface, which reduces the elastic and plastic deformation of the contact surface of the grinding pair, and can delay the generation or expansion of fatigue cracks, thereby improving the surface corrosion resistance.
2. Chrome plating:
The piston rod is chrome-plated to have a hard, smooth, corrosion-resistant surface. Therefore, if you want to improve the corrosion resistance of the piston rod surface, you need to go through chrome plating. After chrome plating, the hardness of the coating on the piston rod can be as high as HV1100, and the coating is smooth, uniform in thickness, and strong in dispersion, so that it can be greatly improved in some aspects.
3. Conditioning:
Quenching and tempering is the quenching and tempering treatment of the piston rod. After the quenching and tempering treatment, the working strength of the material can be effectively improved, which helps to close the micro cracks on the surface, hinders the expansion of erosion, and thus improves the surface corrosion resistance. However, not all piston rods need to be quenched and tempered, so the quenching and tempering treatment should be judged according to the actual situation and materials.
The content introduced above is the method to improve the corrosion resistance of the piston rod surface. The better the corrosion resistance of the piston rod surface, the easier it is to prevent the piston rod from being corroded, so that a longer service life can be obtained.
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