Patch corrosion rate test
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I would like to ask everyone: since the coupon method is commonly used to measure the corrosion rate in circulating cooling water, is it necessary to pre-coat the coupons as a preprocessing step? Is it necessary to use a hanging rack? How big is the difference between them? Thank you all
If the pipeline has been pre-coated, the hanging plates also need to be pre-coated; the purpose of these hanging plates is to serve as a reference for the degree of corrosion on the pipeline
Thank you. Are there any reference standards for this?