Measuring Residual Chlorine Salts on Metal Surface

Is this to be a none destructive test or is it a once only test??

What amount of salt build up would you be expecting to measure

And

What accuracy would you be looking for?

thanks - John@march-designs.co.uk

I agree with John that you need to specify the amount. I believe it is in ppm level or ng per sq. cm. hence use distilled water to disolve the salt and estimate it chemically. If salt is not water soluble, then use mild acid HNO3.

I agree with Shyam a standard way of measuring the soluble salts on steel is defined by ISO 8502-6 in the bresle method, check this out http://www.bresle-method.com/en/index.html