Hard chrome plating rolls

Chrome plating is performed by immersing machine parts or other details in a bathtub with a chrome salt solution. Thanks to electrical charge, chemical reactions occur and thanks to that chromium deposite itself onto the surface or rolls.

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HARD CHROME ROLLS PLATING

 

Rolls covering with technical chromium is a treatment method aimed at imparting appropriate thermal properties or increasing resistance to mechanical wear. The chromium-plated dosing rollers prevent the material from sticking to the coating. Chrome coating provides us high wear resistant and low friction thanks to that chrome is an excellent solution to cover any moving parts, like pistons . Rolls covered with chrome have excellent corrosion resistance.

Chrome plating is performed by immersing machine parts or other details in a bathtub with a chrome salt solution. Thanks to electrical charge, chemical reactions occur and thanks to that chromium deposite itself onto the surface or rolls.

We offer technical hard chrome covering of rolls, pistons, cylinders and other machine parts.

 

Chrome rolls properties

  • Corrosion resistance
  • Low coefficient of friction
  • High wear resistance
  • Extra smooth roll surface

Our offer includes:

  • Chrome rolls for the furniture
  • Chrome rolls for packing industry
  • Chrome rolls for any other industry
  • Plating of technical chrome on machine parts like pistons, cylinder etc.
  • Grinding the chrome coating
  • Technical chrome covering

We provide chrome plating of the roller coating in the following areas:

 

  • Diameter up to 490mm
  •  Length up to 6000mm
  •  Chromium hardness -63 HRc
  •  Circularity 0.02mm
  •  Runout 0.01
  •  Roughness 0.02 µm

 

What is Hard Chrome Plating?

At the heart of hard chrome rollers lies the process of hard chrome plating, a pivotal aspect of surface engineering. Hard chrome plating, a subset of chrome plating, involves the application of a thin layer of chromium onto a metal object, typically steel, to enhance its properties. Unlike decorative chrome plating, which focuses on aesthetics, hard chrome plating (also known as industrial chrome plating) prioritizes functionality.

The chrome plating process begins with the preparation of the metal object, where surface impurities are meticulously removed. The object is then immersed in a chrome plating vat containing a plating solution, usually a chromic acid or chromium chloride solution. This solution facilitates the deposition of chrome onto the metal surface through an electroplating process. The thickness of the chrome layer, crucial for determining the roller’s wear resistance and corrosion resistance, is carefully controlled during this phase.

Hard chrome plating differs from decorative chrome plating not only in its purpose but also in the thickness of the chromium layer applied. While decorative chrome imparts a shiny appearance and only a thin chrome layer, hard chrome plating involves a substantially thicker layer, enhancing the underlying metal’s durability and resistance to wear and corrosion.

The nuances of this process, including the use of hexavalent chromium or trivalent chromium plating, have significant impacts on the properties of the final product. For instance, trivalent chromium plating, a more environmentally friendly alternative, still ensures high hardness and low friction, key attributes for industrial applications. Meanwhile, the conventional chrome plating process, often utilizing hexavalent chromium, is known for its high degree of hardness and corrosion resistance.

This explanation sets the stage for understanding the pivotal role of hard chrome plating in the fabrication of high-performance industrial rollers. As we proceed, the article will explore the extensive benefits, intricate manufacturing processes, and diverse applications of hard chrome rollers, substantiating their integral role in various industrial sectors.

Benefits of Hard Chrome Rollers

Corrosion, Wear and Abrasion Resistance:

One of the standout qualities of hard chrome rollers is their exceptional corrosion resistance. This attribute is crucial in industrial settings where rollers are exposed to corrosive substances or harsh environments. Additionally, the hard chrome layer significantly increases the wear resistance of the rollers. This means that they can withstand repetitive contact and friction without deteriorating, thus maintaining their integrity over prolonged periods.

High Strength, Hardness, and Durability:

Hard chrome plating enhances the base metal’s hardness to a significant degree. This increased hardness translates into high strength and durability, ensuring that hard chrome rollers can endure heavy loads and high-pressure conditions typical in industrial applications. The durable surface created by hard chrome plating extends the service life of rollers, making them a cost-effective solution in the long run.

Improved Metal Surface Performance:

The process of hard chrome plating imparts a smooth and even surface to the metal. This smoothness is not just aesthetically pleasing but also functional, as it allows for easy cleaning and maintenance. The ability to maintain a clean surface is especially valuable in industries where hygiene and cleanliness are paramount.

Chemical Resistance and Low Coefficient of Friction:

Hard chrome rollers are also noted for their chemical inertness. This quality makes them resistant to various chemicals, further broadening their applicability in different industrial sectors. Moreover, the low friction characteristic of hard chrome surfaces reduces energy consumption during operations, enhancing overall efficiency.

Customization and Precision in Manufacturing:

Hard chrome rollers can be tailored to specific industrial needs. The chrome plating process allows for precise control over the chrome layer’s thickness, ensuring that each roller meets the exact requirements of its intended application. This level of customization is a testament to the versatility and adaptability of hard chrome plating in industrial manufacturing.

Manufacturing Process of Hard Chrome Rollers

The manufacturing of hard chrome rollers involves several critical stages, each demanding meticulous attention to detail to ensure the highest quality and performance standards.

  1. Preparation of the Metal Base: The process begins with selecting the appropriate metal, typically steel, which forms the base of the roller. This metal is then carefully prepared, with any surface impurities being removed to ensure optimal adhesion of the chrome layer.
  2. Electroplating Process: The prepared metal object is then submerged in a plating bath containing a chromium solution. This solution, often comprising chromic acid or chromium sulfate, facilitates the deposition of chromium onto the metal surface. The electroplating process involves passing an electric current through the solution, causing chromium ions to adhere to the metal object.
  3. Controlling the Chrome Plating’s Thickness: A critical aspect of the process is controlling the thickness of the chrome layer. This is achieved by adjusting the duration and intensity of the electroplating process. The desired thickness is determined based on the roller’s intended use, with thicker layers offering greater wear resistance and durability.

Applications of Hard Chrome Rollers

Hard chrome rollers find their application in a myriad of industrial settings, owing to their robustness and versatility. Key areas of application include:

  • Hydraulic and Pneumatic Systems: In these systems, hard chrome plated rollers are favored for their corrosion resistance and durability. They are commonly used in hydraulic cylinder rods where they resist wear and sustain the integrity of the system.
  • Manufacturing and Processing Industries: From the automotive industry to the production of cooking utensils, hard chrome rollers are integral in various manufacturing processes. Their high hardness and surface durability make them ideal for handling heavy materials and high-speed operations.
  • Printing and Textile Industries: The ability to polish hard chrome to optical mirror finishes is especially beneficial in the printing and textile industries. Here, the rollers need to maintain a flawless surface to ensure quality prints and fabric processing.

Comparative Analysis with Other Rollers

When compared with rollers undergoing different types of plating, such as nickel plating or decorative chrome plating, hard chrome rollers often emerge as the superior choice for industrial applications. While nickel plating provides good corrosion resistance and a decorative finish, it lacks the extreme hardness and wear resistance of hard chrome. Decorative chrome plating, primarily used for aesthetic purposes, does not offer the same level of durability and is more suited to applications where the visual appeal is a priority over functional strength.

Maintenance and Care

Maintaining hard chrome rollers is straightforward, owing to their chemical inertness and corrosion resistance. Regular manual cleaning to remove dirt and grime suffices in most cases. However, it’s important to regularly inspect these rollers for any signs of wear or damage, especially in high-stress environments. Timely re-plating or refurbishing can extend the life of hard chrome rollers, making them a long-term investment for many industries.

Conclusion

Hard chrome rollers, characterized by their exceptional wear resistance, corrosion resistance, and durability, stand as a testament to the advancements in surface engineering and material science. Through the process of hard chrome plating, these rollers gain attributes that make them indispensable in a vast array of industrial applications, from manufacturing and processing to aerospace and energy sectors.

As technology continues to evolve and environmental considerations become more prominent, we can expect to see further innovations and adaptations in the field of hard chrome plating. This evolution will likely lead to even more efficient, sustainable, and versatile applications of hard chrome rollers, reinforcing their status as a cornerstone in modern industrial operations.

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