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#153 Corrosion Resistance Standards of Platings in Application Environments

Category : Electroplating
March 8, 2013

Platings corrosion resistance standards in application environments are approximately as follows. There are spraying times for salt water spray tests and CASS tests shown in the table. The rating numbers after these tests must be 9 (R.N.9) or greater.

Base metalPlating type,
thickness		Application
environment		Neutral salt water
spray test		CASS test
SteelCu+Ni10b,Cu+Ni15b,Cu+Ni20bD
Normal Interior, Residential home, Office, etc. 		24　
Nickel
Nickel alloy		Ni3b,Ni5b,Ni10b
SteelCu+Ni3b,Cr 0.1,Ni3b,Cr 0.1,Cu+Ni5b,Cr 0.1,Ni5b,Cr 0.1,Cu+Ni10b,Cr 0.1,Ni10b,Cr 0.1　4
Cu+Ni5b,Cr 0.1,Ni5b、Cr 0.1,Cu+Ni25b,Cr 0.1,Ni20b,Cr 0.1C
Humid room		　8
Cu+Ni30b,Cr 0.1,Ni25d,Cr 0.1,Ni30b,Cr 0.1,Ni40b,Cr 0.1B
Normal outdoor		　16
Cu+Ni50b,Cr 0.1,Ni30d,Cr 0.1mpA
Corrosive outdoor		　24
Copper,
Copper alloy		Ni2b、Cr 0.1D　4
Ni2b,Cr 0.1,Ni5b,Cr 0.1C　8
Ni10b,Cr 0.1,Ni25b,Cr 0.1B　16
Ni25b,Cr 0.1mpA　24
Zinc alloyCu+Ni10b,Cr 0.1,Cu+Ni15b,Cr 0.1D　4
Cu+Ni20b,Cr 0.1,Cu+Ni25b,Cr 0.1C　8
Cu+Ni30b,Cr 0.1,Cu+Ni40b,Cr 0.1,Cu+Ni30b,Cr 0.1mp,Cu+Ni40b,Cr 0.1mpB　16
Cu+Ni40b,Cr 0.1mpA　24
Aluminum
and its alloys		Ni10b,Cr 0.1D　4
Ni20b,Cr 0.1C　8
Ni30b,Cr 0.1B　16
Ni35d,Cr 0.1mpA　24

※Explanation on platings:
b: Glossy plating
d: Dual coat plating (e.g. semi-glossy nickel plating+glossy nickel plating)
mp: Micro porous chrome plating
Cu+Ni10b: Copper plating and glossy nickel plating, total thickness of 10μm

MISUMI USA eCatalog

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