Electroplated cadmium is a robust and versatile metallic coating. Cadmium is a soft white metal that, when plated onto steel, cast iron, malleable iron, copper, and powdered metal, functions as a “sacrificial coating,” corroding before the substrate material. Cadmium plated surfaces resist mold or bacteria growth. The typical thickness of cadmium ranges from .0002to.0008 inches. Typical chromates applied include Clear, Yellow, Olive Drab and Black.

Black oxide or blackening is a conversion coating for ferrous materials, stainless steel, copper and copper based alloys. It is used to add mild corrosion resistance, to enhance appearance and to minimize light reflection. To achieve maximal corrosion resistance, the black oxide must be impregnated with oil or wax. One of its advantages, over other coating processes, is its minimal build-up.

Anodizing is an electrochemical process that converts the metal surface into a decorative, durable, corrosion-resistant, anodic oxide finish. Aluminum is ideally suited for anodizing . Anodizing layer is nonconductive also.

Passivation is the process of treating or coating a metal in order to reduce the chemical reactivity of its surface. On stainless steel, passivation requires removing the free iron from the surface of the metal using an acid solution to prevent rust. Passivation is the final treatment/cleaning process used to remove iron from the surface of corrosion resistant steel parts to insure than a more uniform formation of a passive surface is obtained, thus enhancing corrosion resistance.

Specifications: QQ-P-35C, ASTM A967,or as specified by clientswith specific requirements.

Irridite is a chemical process that produces a protective chromate conversion film on aluminum and aluminum alloys. The application process is by dip/immersion producing a coating ranging from Clear to Dark Yellow. The process is RoHS (Clear Irridite/Surtech 650).

Specifications: MIL-DTL-5541F, PPS 6.2.1, ASTM B449,or as specified by clients with specific requirements.

Materials that can be zinc plated : Aluminum and Al alloys.

Zinc plating involves the electro-deposition of a thin coating of zinc metal onto the surface of another metal object/base-metal. The zinc coating is a sacrificial that prevents rust from reaching the underlying metal surface. Zinc is chosen because of its innate ability to fight corrosion. Zinc Plating can be Clear (Trivalent), Yellow (Trivalent and Hexavalent) and Black. Parts can be baked to avoid hydrogen embrittlement. The thickness for zinc plating can vary from 0.0001” to 0.001” or as per our clients’ request. The expertise developed over the years in addition to the technologies used in constant evolution allows Groupe Altech to remain a benchmark for the quality of work and the service offered to customers.

Olive drab Chromate can be done after Zinc Plating at clients’ request.

Specifications: ASTM B633, PPS 6.2.18, ISO 2081, QQ-Z-325 or as specified by clients with specific requirements.

Materials that can be zinc plated: Steel, Brass and Zinc alloy.