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The Hardest Industrial Roller Coating: Tungsten Carbide Excluding laboratory-grade diamond materials, tungsten carbide is generally considered one of the hardest and most practical coating materials for industrial rollers.

Industrial chrome roller refers to roller equipment that is plated with a uniform layer of chrome on the surface of the roller body through an electroplating process. The thickness of this chrome coating is generally between a few microns and hundreds of microns, depending on the specific application requirements. Non-chrome rollers are roller equipment that has not been electroplated with chrome.

Compared with other types of rollers, industrial chrome-plated rollers can operate at higher speeds without affecting the matting effect of paper due to their excellent smoothness and wear resistance.

Industrial rollers are subject to a lot of friction during daily operation, and the roller surface is prone to wear, especially under high-speed or long-term operation conditions. The chrome plating layer can significantly improve the wear resistance of the roller due to its excellent hardness (usually between 800-1200 HV).

Hydrochloric acid is a strong acid and is highly corrosive. Although the chromium oxide layer can resist the erosion of hydrochloric acid to a certain extent, under conditions of high concentration and high temperature, hydrochloric acid can effectively dissolve the chromium metal and its oxide layer, causing damage to the chrome plating layer.

In theory, the chrome layer will not fade under most working conditions. The stability of chrome metal itself is extremely high, and the chromium oxide layer on its surface can effectively prevent the external environment from corroding the chrome layer. Therefore, the chrome layer can usually maintain its original luster and color for a long time and is not easy to fade.

The hardness of the chrome plating layer of industrial chrome-plated rollers is usually between 800 and 1000 Vickers hardness (HV). This hardness range depends on the specific conditions of the chrome plating process, including current density, temperature, plating solution composition, etc.

chrome-plated rollers are suitable for high-precision, high-load applications due to their high hardness, wear resistance and corrosion resistance, while rubber-laminated rollers are widely used in environments sensitive to surface pressure due to their softness, elasticity and material protection.

There are many methods for checking the thickness of chrome plating, which can be divided into two categories: non-destructive testing and destructive testing according to different equipment and occasions.

The process sequence of chrome-plated rollers: Raw material preparation Roller body processing 1. Rough processing 2. Finishing 3. Heat treatment Pretreatment 1. Cleaning 2. Pickling 3. Activation Electroplating process 1. Electroplating equipment preparation 2. Chrome plating solution preparation