{"id":9727,"date":"2021-10-12T12:14:46","date_gmt":"2021-10-12T08:44:46","guid":{"rendered":"https:\/\/n-icc.com\/corrosion-tests\/"},"modified":"2021-10-15T13:36:11","modified_gmt":"2021-10-15T10:06:11","slug":"corrosion-tests","status":"publish","type":"post","link":"https:\/\/n-icc.com\/en\/corrosion-tests\/","title":{"rendered":"Corrosion tests"},"content":{"rendered":"

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1- Electrochemical corrosion tests<\/h4>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\n\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t
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Corrosion is an electrochemical process that involves oxidation and reduction reactions. When corrosion occurs, electrons are released by the metal and consumed by oxidizing agents. This causes an electric current in the corrosion reaction that can be measured and controlled electronically.<\/p>\n

Therefore, experimental electrochemical methods can be used to describe the corrosion properties of metals and metal components in combination with different electrolyte solutions. Naftan Payesh Company is able to perform electrochemical corrosion tests using advanced potentiostat devices and three electrode cells, including constant current, constant potential, TOEFL, dynamic polarization, cyclic voltammetry, electrical impedance, etc.<\/p>\n

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2- Corrosion tests with stress<\/h4>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\n\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t
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Stress corrosion cracking is difficult to predict and diagnose and can lead to catastrophic failure, often without warning. Certainly, determining the resistance and sensitivity of metals and alloys to cracking, before being put into service, will help to choose the right alloy and prevent accidents, and will avoid high industrial costs and safety hazards.<\/p>\n

Stress corrosion tests include the following, which is the sour gas test environment (H2<\/sub>S):<\/p>\n

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  • SCC test in accordance with NACE TM0177 standard<\/li>\n
  • HIC test and interpretation of its results in accordance with NACE TM0284 standard<\/li>\n<\/ul>\n

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    3- Salt mist tests<\/h4>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\n\t\t\t\n\t\t\t\t\t<\/div>\n\t\t\n\t\t\t\t\t
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    The salt spray test (or salt mist test) is a standard method used to test the corrosion resistance of materials and surface coatings. The test materials are usually metals that have a coating or paint. With the help of salt mist spray test, the resistance of coatings against saline environment can be measured.<\/p>\n

    In this test, the appearance of corrosion products (rust or other oxides) is evaluated after a predetermined period of time. The duration of the test depends on the corrosion resistance of the coating. In general, the more corrosion-resistant the coating, the longer the test period before corrosion or rust products appear.<\/p>\n

    There are different standards for salt spray testing, including: ASTM B117 released in 1939 and ISO 9227, JIS Z 2371 and ASTM G85 standards.<\/p>\n

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