Potassium Thiocyanate solution also used to determine Chloride, Bromide and Iodide in presence of Silver Nitrate with Potassium Thiocyanate titrant using a Ferric Alum Indicator.
During test on passivated stainless steel, A black spot will appear when the surface has not been passivated correctly. Various qualities of passivation will give graduations of grey shades, ranging from light (acceptable) to dark (unacceptable)
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