The anode feed pipe has turned red; how can it be cleaned?
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For the ICP analysis of brine, the data has always been within acceptable limits, and the iron content has never exceeded the specified thresholds. However, after being used for a while, the hoses at the inlet and outlet of the electrolyzer’s anode turn increasingly red, with a layer of substance clearly adhering to their surface; this substance can be removed by wiping it away with your hand. Since repairs to the electrolyzer are planned soon, it is considered to use a larger test tube brush to clean the outlet hoses. But the inlet hoses are relatively thin and long – how should they be cleaned? I wonder if an alkali can dissolve it? Friends who have had such experience are kindly asked to offer guidance.
Use a large brush for the discharge pipe and a small brush for the feed pipe; ask the employees in charge of analysis – the kind of brushes they use to clean test tubes and measuring cylinders
Has the original poster analyzed what the red substance is?
Curious about what it is, so as to use it as a reference{:2_32:}
It happened to us too; it was ferric chloride that caused it. During the night shift, an excessive amount of ferric chloride was added in a short period of time; samples were taken for testing after daybreak, and the iron ion concentration was not high either.
If the brine is made acidic, can ICP be used?
If ordinary iron ions can be removed with acid, then for those where iron is complexed with silicon and aluminum in the form of organic compounds, alkali must be used for removal