What is Hard Chrome Plated Rod?

Hard chrome plated rods look attractive and serve heavy duty purposes. Using the most advanced surface removal, polishing, hard chrome plating process design. They are available upon customer request and are used in different areas of construction, materials, handling equipment, agricultural equipment, industrial machinery and almost in the largest places. The bars are first precision milled and then subjected to gard surface chrome treatment to achieve a surface accuracy of f8 grade and surface hardness above HV850, which not only helps to improve wear resistance, but also helps to extend the life cycle of the bars, thus helping customers to save costs.

The chromium plating of chromium-plated bars plays an important role in the properties of the matrix. First of all, the wear resistance of the product is significantly improved. Depending on the process requirements, the chrome layer can be obtained with different hardness of 400 to 1200 HV. The sliding friction coefficient is about 50% of that of steel and cast iron, and it has anti-adhesion property. Secondly, the corrosion resistance is improved. The chromium layer is passivated on the surface under slight oxidation to form a very thin and transparent passivated film, which does not change color for a long time at room temperature to protect the chromium plating layer.

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For the chrome-plated piston rod, the strength of the chrome-plated layer decreases with the increase of its thickness. The bonding strength between the chromium plating layer and the matrix is higher than that between the crystals, and the tensile strength and fatigue strength decrease with the increase of the coating thickness. Therefore, the thickness of the chrome layer should generally be less than 0.3mm.
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It should be noted that the chrome plating layer is relatively brittle and cannot withstand large deformation to avoid cracking or falling off the chrome plating layer. Therefore, the base metal part of the chrome plated piston rod should have sufficient strength to resist all external forces applied in the direction of the thickness of the coating.

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