Fig. 10. Visual observations of (a) WEP, (b) WEP/PCNS@CMCS, (c) WEP/PCNS@8-HQ, and (d) WEP/PCNS@CMCS@8-HQ after exposure to salt spray test conditions (5 wt% NaCl solution, pH 6.5–7.2) for 0, 5 and 10 days.
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