Surface Treatment Process

The surface Treatment Process is an additional process applied to the material to improve its life and functionality. Mostly, such coatings are done to prevent rust, resist wear, and enhance its appeal or appearance. CNC machined parts can be improved with coatings to improve hardness, lubricity, and even corrosion resistance.

The surface treatment process can usually be the removal of substances from the part or the additive process of applying a specific coating to protect or improve the life of the part. Today, almost every industry requires surface treatment for their CNC machined and VMC machined parts. Broadly, there are 5 categories under which the surface treatment process can be divided, namely:

  • Cleaning
  • Polishing
  • Painting
  • Plating
  • Heat treatment.

SLH Engineering can help our customers with heat treatment process like

  • Hardening
  • Case Hardening
  • Induction Hardening
  • Silver Plating
  • Nitriding
  • Zinc Trivalent Coating, etc.


We leverage the network of our reliable suppliers to get a wide variety of surface treatment process done for the CNC machined parts.