In addition, selection of a more corrosion resistant topcoat such as high phosphorus electroless nickel plating services, can improve corrosion performance. The use of multi-layer systems such a copper underplate prior to a nickel or tin topcoat, will reduce the overall porosity and enhance corrosion performance. If you have an especially poor base, a thickness of greater than 0.0005″ may be required. Those deposits with less will rust fairly quickly, especially in moist environments. Minimum rust protection starts at about 0.0003″. Typical examples of problematic surfaces are those with cut threads and those that are stamped or sawn. If the substrate is pitted, torn, cratered or otherwise discontinuous, the coating will have to be much thicker to effectively cover these substrate flaws than for a coating which will be deposited over a smooth surface morphology. The effectiveness of either coating type is highly dependent on the surface texture over which it is laid. Holes in the deposit become avenues for the entrance of oxygen and water to reach the underlying steel and start the corrosion process. For this method to be successful the deposit must be pore-free. This method is typical of nickel plating on steel and is referred to as a “cathodic” coating. The oxidation of the deposit often leaves a white chalky film on the surface of the part.Ĭoatings can also prevent substrate oxidation by encapsulating the basis metal and sealing it from the environment. These “anodic” coatings corrode in preference to the substrate. Coating selection:Ĭoatings can prevent substrate oxidation by protecting anodically, as in the case of zinc or cadmium over steel. However, several finishing decisions must be made.

To stop the oxidation of substrates would seem to be a simple matter.

Selective Plating Services (Electroplating and Electroless Plating).

Plate to Gauge or Plate to Dimension Services.

Copper Plating of Bullets and Projectiles.

However, copper oxidation produces harmful effects in. This protection can be seen on copper roofs and gutter work as well as on outdoor sculptures and statuary, namely the Statue of Liberty.

Black Nickel Plating (Electrolytic) Services One positive effect of copper oxidation includes the formation of a protective outer layer that prevents further corrosion.

Electroless Nickel Plating vs Electrolytic Nickel Plating.

Tacti-Black® & Electroless Nickel Firearms Finishes.

Black Electroless Nickel Plating (Tacti-Black®) Services.

Will copper rust