Hard Chrome Plating Service-Hard Chrome Plating

Hard Chrome Plating Service
Chunichi Craft Co., Ltd.

About This Product

■What Is Hard Chrome Plating?Hard chrome plating, also known as "industrial chrome plating," has a history of about 100 years since its practical application. It has a mirror-like luster, high corrosion resistance, and resistance to discoloration. It also possesses the characteristics of an industrial surface treatment, such as high hardness, excellent wear resistance, low friction coefficient, excellent mold releasability, and excellent corrosion resistance.

■Coating Properties of Hard Chrome Plating・High Hardness
Hard chrome plating is the hardest among ordinary electroplating processes, far harder than heat-treated steel or nitrided steel. (Hv 800 to 1,000)

・Heat Resistance
The hardness of hard chrome plating changes with heat treatment, gradually decreasing up to 200 to 400°C and dropping sharply above 400°C. Above 800°C, it settles at Hv 200 to 300, the value of ordinary chromium metal. This is thought to be due to the crystals of electrodeposited chromium breaking down and recrystallizing at around 500°C. Heat treatment to relieve hydrogen embrittlement of the plating is performed at around 200°C, where the structure of the electrodeposited chromium is not affected.

・Low Friction Coefficient
The friction coefficient of hard chrome plating is extremely low, the lowest among commonly used materials.

・Wear Resistance
This is the most important fundamental property required of hard chrome plating, and it is extremely good.

・Corrosion Resistance
Hard chrome plating is stable against chemicals other than chlorides, and coatings with a thickness of 10 µm or more show relatively good corrosion resistance even in the atmosphere.

・Mold Releasability
Hard chrome plating is generally considered to have good mold releasability. This is because the surface energy of the metal itself is lower than that of other metals. Taking water repellency as an example, when a water droplet is placed on steel and on chrome plating, the results are:
Contact angle between steel and water droplet: 40°
Contact angle between chrome plating and water droplet: 70°
This also shows that chrome plating resists adhesion and has good releasability.

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Hard Chrome Plating Service

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Chunichi Craft Co., Ltd.

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1 Models of Hard Chrome Plating Service

Image	Part Number	Price (excluding tax)	Baking	Products Handled	Maximum Workpiece Size	Maximum Weight	Material	Inspection	Applications
	Hard Chrome Plating	Available upon quote	191°C, 3~5h	Rubber molds, plastic molds, press dies, glass molds, SMC molds, sand molds, tile molds, roof tile molds, rolls, machine parts, jigs and tools, etc.	5,500x2,400x2,000	15t	Iron, cast iron, copper, stainless steel, aluminum, and other non-ferrous metals	Appearance, film thickness, tolerance dimensions; test reports can be issued	Wear resistance, high hardness, mold releasability, lubricity, corrosion resistance, seizure prevention

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Chunichi Craft Co., Ltd.

Japan

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Hard Chrome Plating Service Chunichi Craft Co., Ltd.

About This Product

■What Is Hard Chrome Plating?

■Coating Properties of Hard Chrome Plating

1 Models of Hard Chrome Plating Service