Are you looking for a surface treatment that has high hardness, corrosion resistance, and heat resistance to replace DLC?
Cromall is a chromium-based alloy plating that contains 2-4% carbon, offering high hardness and excellent wear resistance. Unlike conventional hard chrome plating, it is crack-free and has fewer coating defects like those found in DLC films, resulting in superior corrosion resistance. (The corrosion rate in hydrochloric acid is one-third that of hard chrome plating, and can be reduced to one-sixth with heat treatment.) Compared to DLC films, which begin to degrade at around 300°C and lose adhesion, Cromall maintains stable adhesion and demonstrates good adhesion even at high temperatures. It is also possible to treat inner surfaces where DLC processing is not effective.
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basic information
Case 1 ■Before Implementation Hard chrome plating was used to prevent edge drooping of the fine holes in the fiber mouthpiece and to prevent eye discharge. Additionally, there was a desire to apply a treatment with improved wear resistance, but DLC could not withstand the 300°C operating temperature and the 400°C temperature during the cleaning process. ■After Implementation By applying the Croamore treatment, wear resistance improved, and the lifespan of the mouthpiece increased. It also maintained high hardness at the 300°C operating temperature, and there was no degradation of the coating or reduction in adhesion at the 400°C cleaning process, lasting 4 to 5 times longer compared to hard chrome plating. Case 2 ■Before Implementation Hard chrome plating was used on PVC building material extrusion molds, but corrosion due to cracks in the plating occurred, leading to peeling issues. The surface gloss was also inconsistent, affecting the flow of the resin. DLC was also tested, but like hard chrome plating, corrosion occurred, leading to abandonment of that option. ■After Implementation By applying the Croamore treatment, the lifespan increased to 3 to 4 times compared to the hard chrome plating, which required reprocessing approximately every month. Additionally, since the gloss before plating was almost maintained, polishing after plating became unnecessary, stabilizing the flow of the resin.
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Applications/Examples of results
■ Semiconductor encapsulation molds that require surface mirror finish and wear resistance ■ Fuel injection nozzles that require corrosion resistance to sulfur components contained in fuel ■ Resin molding molds used in high-temperature environments where DLC is difficult to apply ■ Resin pipe molding molds where internal surface treatment is difficult and cannot be applied with DLC
Detailed information
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【Cross-section photo of Croamore】Unlike typical hard chrome, there are no cracks in the plating film.
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Cross-sectional photo of hard chrome plating
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Download All Catalogs![[Free Sample Available] Functional Coating 'Cloarmore'](https://image.mono.ipros.com/public/catalog/image/01/b80/496117/IPROS91791994196727599353.jpeg?w=120&h=170)
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Company information
We are a technology-oriented company that focuses on plating technology and roll manufacturing technology as our two main pillars. We possess extensive know-how in various functional plating and high-precision roll manufacturing and processing, and we strive to be of service to our customers day and night. We actively take on challenges that other companies have declined or that no other company is willing to tackle.