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Sodium dodecyl sulfate can cause little copper plating coating hair flower or fog

Time:2015/11/4 5:49:35

Cause analysis and treatment method: in acid copper plating liquid, sodium dodecyl sulfate is the anionic surface active agent, when its content is insufficient, can make hydrogen adsorption on the surface of the workpiece, blocking coating of metal deposition, led to the coating on the surface of the hair flower.
Check the method of sodium dodecyl sulfate:
(1) take a test fluid, 0.05 g/L added directly to the test solution, sodium dodecyl sulfate, if the fault phenomenon disappeared after China's entry into wto, sodium dodecyl sulfate content too little.
(2) with a diameter of 2 mm of fine wire circle in the company of 90 ~ 100 mm circle, leave a head, the vertical circle in plating solution, and then gently pull one end of the wire, such as circle liquid membrane is broken, and that too few of sodium dodecyl sulfate content in the plating solution. Such as ring above the liquid film can maintain lmin don't break, that its content is enough or exceed the allowed limit.
Methods: adding 0.05 g/L sodium dodecyl sulfate
Special emphasis is that if too much sodium dodecyl sulfate content, breakdown products, also the pollution of plating solution, plating hair flower also can appear.