Process Security when Electroplating by Analysing the Surfactant's Concentration

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Problem:

Surfactants are surface-active substances which are used in nickel baths as a support of coating processes in order to ensure a wetting of surfaces with electrolytes and to prevent the development of gas bubbles. When using the bath it happens that coated surfaces and parts of the surfactant get removed off the bath. Therefore, it is essential to know the current surfactant’s concentration in order to guarantee a consumption-oriented redosage of surfactants. Measurement methods such as the titration could provide you with exact measuring result after an appropriate expenditure of time. There is a new method measuring the surfactant’s concentration with the help of the surface tension in a very fast and reliable way.

Procedure:

The values of the surface tension correlates with the surfactant’s concentration which can be defined directly by a nonrecurring reference function. The reference function only has to be definded only once and is available as formula for calculations or as graph and table respecticely.
Measuring the surface tension of a sample which has been taken out of the bath does only take a few seconds.

Referenzkurve Nickelsulfamatlösung mit Netzmittel

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