Influence of surface liquid segregation on corrosion behavior of semi-solid metal high pressure die

• 作 者: E.P.MASUKU H.MLLER U.A.CURLE P.C.PISTORIUS
• 机 构: Materials Science and Manufacturing,Council for Scientific Industrial Research,Pretoria,South Africa
• 出 处: Transactions of Nonferrous Metals Society of China
• 发表日期: 2010年S3期
• 关键词: aluminium segregation enriched intermetallic monitored separate hardness immersi

The corrosion behavior(in chloride medium) of the surface layer of SSM-HPDC plates of alloys 7075-T6 and 2024-T6 was compared with that of the wrought alloys 7075-T6 and 2024-T6.Potentiodynamic testing was performed in deaerated 3.5%NaCl solution.In separate tests,the open-circuit potential was monitored in aerated 3.5% NaCl for 30 min after immersion.The electrochemical tests show that there is no significant difference in the pitting potential of the wrought alloys and that of the Cu-enriched surfaces of the SSM-HPDC alloys.

The corrosion behavior (in chloride medium) of the surface layer of SSM-HPDC plates of alloys 7075-T6 and 2024-T6 was compared with that of the wrought alloys 7075-T6 and 2024-T6.Potentiodynamic testing was performed in deaerated 3.5% NaCl solution.In separate tests, the open-circuit potential was monitored in aerated 3.5% NaCl for 30 min after immersion. The electrochemical tests show that there is no significant difference in the pitting potential of the wrought alloys and that of the Cu-enriched surfaces of the SSM-HPDC alloys.