f you work in the metalworking industry, you’ve probably heard of it. An alloy forms the tungsten carbide coating with 70 to 97% tungsten carbide (WC) and a binding metal, usually cobalt or nickel, creating a surface of high strength and performance.
Also known as tungsten carbide scrap, this metallic coating is widely used in environments that require high resistance to abrasion and mechanical wear. Its hardness can reach ranges between 1200 and 1350 Vickers and adhesion in the region of 10,000 PSI.
Table of Contents
Coating applied by the thermal spray process, tungsten carbide can be an excellent alternative to solve abrasive wear and erosion problems in the most diverse segments of the industry.
The main benefits of tungsten carbide are:
The main applications consist of:
Before addressing the differences between tungsten carbide and hard chromium coatings, it is essential to point out that both layers are highly effective in protecting the metallic surface of parts and equally capable of increasing the useful life and performance of equipment even in hostile productive environments.
Thus, it is possible to say that the two coatings serve their purpose with excellence, and their differences have much more to do with application and process than necessarily discussing which one is superior.
In other words, with their characteristics and suitable applications, both tungsten carbide and hard chrome have the power to reduce expenses with industrial maintenance and improve your company’s production performance.
Having clarity about the needs of your production line and the properties of each coating is crucial to identify which solution will give your business longer useful life and better industrial performance. Understanding and evaluating from the process, the applied layer, considering the characteristics and forms of application are key issues when assessing the hiring of the coating service.
To better understand, see below the main differences between tungsten carbide and hard chrome plating:
1 – Process
One of the main differences between the two coatings is in the application process. The challenging chrome application process is carried out through a galvanic bath. The coating with tungsten carbide, on the other hand, is applied by hypersonic thermal spray – HVOF – a process using a gun that, through the high speed of particle projection, deposits material on the surface. Whereas in tungsten carbide coating, the deposition is mechanical, in hard chrome, it is electrolytic.
2 – Applied Layer:
Another significant difference between the two coatings is in the applied layer. In the case of hard chrome, the layer varies between 0.05 to 0.20mm, while in tungsten carbide, larger strips can be used, ranging from 0.05 to 0.50mm.
3 – Features
4 – Applications
It is possible to see through the analysis of the properties of the two coatings that each one has advantages and disadvantages depending on the application. So, which one is the best? It depends. When choosing the coating, the work environment and the technical characteristics of the part to be coated will be the decision parameters.
As can be seen, each case of tungsten carbide scrap must be analyzed individually, as both coatings offer superior performance when compared, depending on the application and production context of each equipment, and cannot be definitively listed as the best.
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