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Nickel plating serves both decorative purposes and corrosion protection. Due to the hard coating, it is suitable for use in electrical equipment construction and in the telephone industry. There is no abrasion of the coating, especially on screws. Nickel-plated iron parts are not recommended for outdoor use. Improved corrosion protection is achieved by impregnation.
Veralization is a special process of hard nickel plating. During the process of veralizing, a nickel coating is applied to the surface of a metal in order to harden it and make it wear-resistant. It is a special form of hard nickel plating in which a particularly thick layer of nickel is applied.
Chrome plating is usually applied after nickel plating. A layer thickness of approx. 4 µm chrome has a decorative effect, increases the tarnish resistance of nickel-plated workpieces and improves corrosion protection.
Brass coatings are mainly used for decorative purposes. Steel parts are often brass-plated to improve the adhesive strength of rubber on steel.
Copper plating is often used as an intermediate layer before nickel plating, chrome plating and silver plating. It is used as a top layer for decorative purposes.
Silver applications are used for decorative and technical purposes.
Tin plating is mainly used to achieve or improve solderability (soft solder). It also serves as corrosion protection. Thermal post-treatment is not possible.
Anodic oxidation creates a protective layer on aluminum that acts as corrosion protection and prevents staining. Virtually any color can be achieved for decorative purposes.
Immersion in a zinc bath at a temperature of approx. 440° - 470°C. Coating thickness min. 40 µm. Matt and rough surface, staining possible after a short time. Very good corrosion protection.
Excellent high-zinc coating (silver-grey color) for parts with tensile strength Rm ≥ 1,000 N/mm² (strength classes ≥10.9, hardness ≥ 300 HV). With this coating process, hydrogen-induced embrittlement is ruled out by the process technology.
Mechanical galvanizing is a chemo-mechanical coating process. Degreased parts are placed in a plating drum together with a special glass bead mixture and zinc powder. The glass beads act as a carrier for the zinc powder grains and bring them to the surface of the workpiece, where they bond through cold welding.
Chemical blackening is a chemical process for blackening stainless steels for decorative purposes
Burnishing is a chemical process in which a bath temperature of approx. 140 °C is used, followed by oiling. It is well suited for decorative purposes and offers only light corrosion protection.
This coating offers only light corrosion protection. However, it offers a good degree of adhesion for paints. The appearance is gray to gray-black. Subsequent oiling improves the corrosion protection.
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+86 18964658013
+86 18964658013Company Introduction
In 2007 Shanghai Unibridge Enterprise Co., Ltd. was founded. Specializing in CNC parts and fasteners production.
Now we have Head office locates in Shanghai, China and Branch in Hong Kong and Changshu Jiangsu province.
Contact with us
Contact person: Harris.zhang
WhatsApp: +86 18101761015
Add:
Room 1830 No. 1459 Gaotai Road. JiaDing District, - 201801 Shanghai - PR. China