During manufacturing, storage and transport, corrosive substances in the environment easily attack metal items. Corrosion inhibitors are substances, which, when added to corrosive environments in relatively small dosages, will drastically reduce corrosion rates. Vapour phase corrosion inhibitors or volatile corrosion inhibitors (VCIs), also called vapour phase inhibitors (VPIs), are similar to the organic adsorption-type inhibitors but they possess a high vapour pressure. The purpose of method validation is to demonstrate that the established method is fit for the purpose. Quality control of corrosion test results implies the validation of the corrosion test method and estimation of uncertainty of corrosion rate measurement. The corrosion test in an artificial atmosphere of the humidity chamber needs evaluation of corrosivity of the test cabinet by reference specimens.
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