The Tagnite coating is a unique and highly advanced method of anodizing magnesium alloys. The coating process grows a hard, smooth, magnesium oxide layer on all commonly used magnesium alloys. Like typical anodize or anodic coatings, the part being coated is the anode and positively charged. The submersion tank serves as the cathode and is negatively charged.

The electrolyte used to form the coating is an alkaline solution, which is clear in color and contains no chromium (VI) (Hexavalent Chromium) or other heavy metals. While all known methods of anodizing form a coating layer that contains pores, Tagnite’s dilutes electrolyte grows a highly packed layer with pores that are 6 to 10 times smaller than those found in Dow 17 or HAE (Mil-M-45202) anodic coatings. This small, pore coating layer provides superior corrosion resistance and a smooth surface finish.

Comparing SEM (scanning electron microscope) photographs

Type I

Timeframe

  • 250x
  • 500x
  • 1000x

Coating Thickness: 0.20 – 0.40 mil  | Alloy: ZE41A | Timeframe

Coating Thickness: 0.20 – 0.40 mil  | Alloy: ZE41A | Timeframe

Coating Thickness: 0.20 – 0.40 mil  | Alloy: ZE41A | Timeframe