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Surface Finishes

OptiMIM stands out with its large range of surface finishes that enhance both aesthetics and functionality of metal parts.

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As-Sintered

The surface of a part remains unchanged as it comes out of the furnace. Laser texturing is applied directly to the tool to imprint a textured pattern onto the part.

Black Oxide

This finish is a type of conversion coating where the part’s surface is transformed into black oxide to provide corrosion and wear resistance.

Chrome

Chrome finishes are commonly used in medical devices, automotive applications, and firearms to improve aesthetics and enhance functionality.

Electroless Nickel

The key element of an electroless nickel finish lies in its ability to generate a corrosion-resistant layer for electronics, tooling, automotive and more.

Ferritic Nitrocarburization (Melonite)

This conversion coating turns the part's surface into a hard iron nitride compound, resulting in a wear- and corrosion-resistant finish with a Vickers hardness of 800 to 1500 HV.

HIPing

Hot Isostatic Pressing is a post-casting treatment that uses high pressure and temperature to improve internal structure, close voids, and enhance strength, fatigue resistance, and ductility.

Media Blasting

Media blasting, using smaller media than tumble polishing, can involve glass beads for a glossy finish or aluminum oxide grit for a matte finish. Combining both can achieve a satin finish.

Phosphate (Parkerizing)

This conversion coating interacts with the base alloy, with manganese and zinc phosphate used for corrosion protection and lubrication.

Physical Vapor Deposition (PVD)

The PVD process creates hard metal-based coatings for wear resistance and cosmetics, used in firearms, medical devices, cutting tools, and other applications.

Tumble Polishing

This technique uses porcelain or aluminum oxide media to achieve smoothness without hand polishing, reaching 16 micro inches. Post-tumble polishing, parts can undergo double disk grinding for enhanced material removal and dimensional accuracy.