Surface Finishing Tutorial
#155 Corrosion Resistance Testing Methods of Platings
Category : Electroplating
March22, 2013
Corrosion resistance tests of platings are conducted with the following methods.
1. Neutral salt water spray test | A method of plating corrosion resistance testing in an atmosphere of sodium chloride solution mist by the use of salt water spray test device.Sodium chloride concentration 40g/L, pH=6.5Spray 1.0 - 2.0mL/80cm2/h, Air saturator temp. 47±2℃,Salt water tank temp. 35±2℃, Test chamber temp. 35±2℃Corrosion resistance evaluation: Evaluate by obtaining a rating number of surface corrosion defects based on the standard chart or actual measurement. |
2. Acetic acid salt water spray test | A method of plating corrosion resistance testing in an atmosphere of acetic acid sodium chloride solution mist by the use of salt water spray test device.Sodium chloride concentration 40g/L, Adjust to pH=3.0with acetic acid. Spray 1.0 - 2.0mL/80cm2/h, Air saturator temp. 47±2℃, Salt water tank temp. 35±2℃, Test chamber temp. 35±2℃Corrosion resistance evaluation: Evaluate by obtaining a rating number of surface corrosion defects based on the standard chart or actual measurement. |
3. CASS test | A method of plating corrosion resistance testing in an atmosphere of copper chloride added acetic acid sodium chloride solution mist by the use of CASS testing device.Sodium chloride concentration 40g/L, Copper chloride solution concentration 0.205g/L, pH=3.0, Spray 1.0 - 2.0mL/80cm2/h, Air saturator temp. 63±2℃, Salt water tank temp. 50±2℃, Test chamber temp. 50±2℃Corrosion resistance evaluation: Evaluate by obtaining a rating number of surface corrosion defects based on the standard chart or actual measurement. |
4. Corrodkote test | A method of plating corrosion resistance testing by placing a Corrodkote mud pasted and dried test specimen in a humid chamber.The Corrodkote mud is formulated with Copper nitrate solution (5g/L) 7mL, Ferric chloride solution (5g/L) 33mL, Ammonium chloride solution (100g/L) 10mL mixed evenly with Kaolin clay 30g.Humid chamber temp. 38±2℃, Relative humidity 80~90%Corrosion resistance evaluation: Evaluate by obtaining a rating number of surface corrosion defects based on the standard chart or actual measurement. |
5. Sulfur dioxide test | A method of plating corrosion resistance testing in an atmosphere of sulfur dioxide by using a sulfur dioxide testing device.Sulfur dioxide concentration 25±5ppm or 1000±50ppm, Test chamber temp. 40±1℃, Relative humidity 90±5%Corrosion resistance evaluation: Evaluate by obtaining a rating number of surface corrosion defects based on the standard chart or actual measurement. |
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