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Corrosion quiz - 5

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 Corrosion quiz - 5


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Coupon test for corrosion inhibitors

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Concept Coupon test is used to gauge a material's corrosion rate in a corrosive environment. It is also used to test the efficiency of corrosion inhibitors. Parameters Material - The coupons are made from the same or similar material as that of the actual component Electrolyte - The electrolyte for exposure is the same or similar to the actual environment. Sometimes, coupons are placed in the actual environment with the component, for example in the soil with submerged pipelines. Steps Clean the coupon of any oil/grease/rust Measure the weight of original coupon - W Measure the Area of coupon to be exposed - A. Take photographs and/or optical micrographs of the coupon Immerse the coupon in the electrolyte without inhibitor Note the time of measurement - t. This is decided by the concerned parties or as per the standards followed. Take out the coupon after the time. Take photographs and/or optical micrographs of the coupon Clean the corrosion products off the coupon. DO NOT USE ROUG...
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