Answer
Place a weighed steel coupon in the bath; weight loss should be a small fraction of the uninhibited rate.
Detailed question
How do I check the inhibitor is working?
Products
RXSOL CHEMO PHARMA International Navi Mumbai, India
Try "boiler water treatment", "tank cleaner" or a chemical name such as "citric acid".
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Place a weighed steel coupon in the bath; weight loss should be a small fraction of the uninhibited rate.
How do I check the inhibitor is working?