Premium
Influence of Heat Treatments on In Vitro Degradation Behavior of Mg‐6Zn Alloy Studied by Electrochemical Measurements
Author(s) -
Zhang Shaoxiang,
Li Jianan,
Song Yang,
Zhao Changli,
Xie Chaoying,
Zhang Xiaog
Publication year - 2010
Publication title -
advanced engineering materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.938
H-Index - 114
eISSN - 1527-2648
pISSN - 1438-1656
DOI - 10.1002/adem.200980052
Subject(s) - alloy , materials science , microstructure , intermetallic , corrosion , galvanic corrosion , electrochemistry , degradation (telecommunications) , metallurgy , galvanic cell , cathodic protection , ageing , phase (matter) , chemical engineering , electrode , chemistry , telecommunications , computer science , engineering , organic chemistry , biology , genetics
Abstract The influence of heat treatment on the in vitro degradation of Mg‐6Zn alloy is studied by electrochemical measurements. After solid‐solution treatment, the microstructure of the Mg‐6Zn becomes more homogeneous, along with an elevated charge‐transfer resistance in SBF and a reduced corrosion current density. After ageing treatment, the discrete intermetallic γ‐MgZn phase enhances the cathodic hydrogen evolution and impairs the corrosion resistance of the alloy. Galvanic cells are expected on ageing, but the ageing process makes the microstructure of the alloy homogeneous. Heat treatment alters the in vitro degradation behavior of Mg‐6Zn alloy and is applicable in adjusting the biodegradation rate.