Study investigates premature failure of magnesium anodes

A recent survey of magnesium sacrificial anode cathodic protection systems installed on Bahrain Petroleum Co. (BAPCO) pipelines in 1998 revealed that many of the anodes had failed prematurely and stopped achieving proper protection levels.This article looks at BAPCO’s Khuff gas distribution system and the investigations carried out into the failed anodes, reasons for the failures, and recommendations for remedial work. It focuses on the use and suitability of sacrificial-anode systems vs. impressed-current systems for the long-term cathodic protection of buried pipelines in desert and reclaimed land areas.BAPCO pipeline systemBAPCO supplies natural gas through a network of abovegrou...

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