279 QTypes of Surface Treatment QApparent Colors of Surface Treatment Bright Chromate Trivalent Chromate Electroless Nickel Plating Hard Chrome Plating Black Oxide Anodize (Clear) Anodize (Black) Name Vickers Hardness (HV) Layer Thickness (μm) Applicable Materials Example Purpose, Features Reference Zinc Plating − 3~20 Steel Thin Plate Wire ·Antirust, low price. ·Poor appearance. − Chromate Plating − 1~2 Steel Plate Work Bolts and Nuts. ·Antirust, low price. ·Fit for mass production. ·Poor appearance, however, can work instead of nickel plating. − Bright Chromate − 1~2 Steel − Trivalent Chromate − 1~2 Steel Bolts and Nuts ·Antirust, low price. ·Do not contain hexavalent chrome. − Nickel Plating − − Steel Copper Brass − ·Improvement of corrosion resistance and decoration ·Chrome plating has more corrosion resistance in the atmosphere. ·Copper base plating as appropriate. ·Not applicable to deep indentations. Class 1 Plating 500 5~20 ·Better appearance than Class 3 plating. ·Material…Buff…Plating…Buff Class 3 Plating − ·Material…Plating Satin Finish Plating − − ·Fatigue resistance. ·Minor flaws remain inconspicuous. ·Material…Satin finish…Plating Electroless Nickel Plating 500 Specifiable Steel Stainless Steel Copper Aluminum Alloy Glass Plastic Parts Unsuitable for Nickel Plating. ·Approx.10 times more expensive than nickel plating. ·Easy film thickness control. ·High corrosion resistance, abrasion resistance. ·Give Conductivity to Non-Metals − Kanigen Plating Up to 1000 Parts hardened after Plating. ·Same as the features of electroless nickel plating. ·Can be hardened by heat treatment after plating. Chrome Plating − − Steel Copper Brass − ·Appearance with gloss ·Good corrosion resistance ·Sliding chrome plating surfaces are easy to stick together. ·Nickel base plating as appropriate. ·Not applicable to deep indentations. Class 1 Plating 500 5~20 ·Better appearance than Class 3 plating. ·Material…Buff…Plating…Buff Class 3 Plating − ·Material…Plating Satin Finish Plating − − ·Fatigue resistance. ·Minor flaws remain inconspicuous. ·Material…Satin finish…Plating Hard Chrome Plating 1000 10~30 Cylinder Liners ·Excellent abrasion resistance. ·More expensive than other chrome plating. ·Material…Plating (Class 3 Plating) Black Oxide (Blackening) − − Steel Bolts Nuts Instruments ·Base coating. ·Appearance(with gloss). ·Rusts more easily than Tufftride ·General Black Oxide Low Temperature Black Chrome Plating − 1~2 Steel Copper Stainless Steel Items requiring high precision, items requiring higher corrosion resistance than blackening. ·Long term antirust performance. ·High corrosion resistance. ·Ultra thin film. ·Low-Temperature Preliminary Treatment. No thermal effect on raw material. Parts coupled with plastic matter, rubber, etc. Anodize Clear − 3~5 Aluminum Alloy − ·Corrosion and abrasion resistance. ·No electric conductivity. ·Heat Resistance ·Some anodize pieces are colored through fine holes in the hard, oxidized film formed on the surface. Black − 5~10 Materials Types and Apparent Colors of SurfaceTreatment
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