{"product_id":"pr-186-073502-r01-large-scale-cathodic-disbondment-testing-for-coal-tar-enamelcte-1","title":"PR-186-073502-R01 Large-Scale Cathodic Disbondment Testing for Coal Tar Enamel(CTE)","description":"\u003cp\u003eCorrosion protection of installed transmission pipelines is mainly achieved by isolating the pipeline from the environment through the use of applied coatings. In areas where coating damage (e.g., holidays) exist, cathodic protection (CP), often by impressed current, is used to protect any bare areas. The amount of current output required for CP tends to increase as the damaged area (e.g. holidays, cracks) progresses over time. Although CP is necessary to protect any bare areas, it can also enhance coating disbondment. Likewise, the extent of cathodic disbondment (CD) could increase as the current from the rectifier is augmented to compensate for the extended damage.\u003c\/p\u003e\n\n\u003cp\u003eIn the United Stated approximately 50 % of the transmission pipelines are coated with coal tar enamel (CTE), many of which have been in service for more than 50 years. The extent of the coating damage (in the form of holidays, open disbondments, cracks and tears) requires incremental increases in CP levels to be applied over time. The objective of this work was to investigate the effect of CP levels on the growth of CD of CTE coated pipes. The CD extent at under protected CP levels was investigated as well. Additionally, the effect of surface contaminant (chloride) on CD of the CTE coated pipes was evaluated.\u003c\/p\u003e","brand":"PRCI Store","offers":[{"title":"Default Title","offer_id":44367594160206,"sku":"18533","price":100.0,"currency_code":"USD","in_stock":true}],"url":"https:\/\/prci-store.myshopify.com\/products\/pr-186-073502-r01-large-scale-cathodic-disbondment-testing-for-coal-tar-enamelcte-1","provider":"PRCI Store","version":"1.0","type":"link"}