Study and improvement of Al-Zn-In alloy sacrificial anode manufacturing process and international quality accreditation
Sacrifi cial anode based on aluminum-zinc-indium alloy (Al-Zn-In) has been manufactured by the Centre for Technology Application and Transfer (CTAT) – Vietnam Petroleum Institute (VPI) at a casting temperature of 750oC, a stirring rate of 20rpm and an annealing temperature of 200°C during 1 hour. The anodes obtained have high quality, homogeneous structure and stable manufacturing procedure. The electrical capacity is higher than 2,500A.h/kg and the close potential is more negative than -1.05V. The electrochemical characteristics and the alloy components of the anodes satisfy the strict requirements for sacrifi cial anodes as certifi ed by Det Norske Veritas (DNV), an international accreditation organisation.
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The National Association of Corrosion Engineers (NACE). Standard test method: Impressed current laboratory testing of aluminum alloy anodes. NACE TM0190-98. 1998.
TCVN 5742 - 1993. Prôtectơ nhôm - Phương pháp xác định dung lượng và điện thế.
International Organization for Standardization (ISO). Petroleum, petrochemical and natural gas industries - Cathodic protection of pipeline transportation systems - Part 2: Offshore pipeline. ISO 15589-2-2012.
Det Norske Veritas. Cathodic protection design. DNV-RP-B401. 2010.
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