Figure 1 (IMAGE)

Tohoku University

Figure 1

Caption

(a) Optical microscopy image of the Al alloy surface in a sodium chloride solution without pH buffering. Discoloration of intermetallic compounds and the deposition of corrosion products increase over time. (b) Optical microscopy image of the Al alloy surface in a boric-borate buffered sodium chloride solution. Discoloration and corrosion product deposition are suppressed, allowing the pit initiation site to be clearly observed. 

Credit

Kaito Takeuchi, Masashi Nishimoto, Izumi Muto

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