Details

Autor(en) / Beteiligte

• Sun, Kaiqiang
• Gao, Hong
• Hu, Jiaqi
• Yan, Yingzhu

Titel

Effect of pH on the corrosion and crack growth behavior of the ZK60 magnesium alloy

Ist Teil von

• Corrosion science, 2021-02, Vol.179, p.109135, Article 109135

Ort / Verlag

Amsterdam: Elsevier Ltd

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• •Benefiting from the stability of protective film, the pitting was suppressed with increased pH.•The entering of hydrogen into matrix was suppressed by blocking of the layer and Mg3(PO4)2.•The differences of crack growth behavior in LI stage were cause by pitting and hydrogen embrittlement. To investigate the effect of pH on corrosion and fatigue crack growth of ZK60 magnesium alloy, the corrosion and fatigue crack growth experiments with cyclic sinusoidal waveform in PBS with pH 5.2, 7.4 and 9.0 were performed. With the increase of pH, the integrity and compactness of the protective layer increased as well as Mg3(PO4)2, reducing the channels for Cl− and hydrogen to contact the magnesium matrix which inhibited pitting and crack growth rate in LI stage. In LII stage, the effect of pH was weakened and the slope of crack propagation curve decreased.