The effect of chromate concentration on the repassivation of corroding aluminum
Conference
·
OSTI ID:6247
- Brookhaven National Laboratory
Current density maps of anodically polarized pure aluminum in chloride solutions were measured and the effect of chromate/dichromate buffer additions monitored. The higher the polarized potential the more chromate was required to repassivate the corroding surface. Small pits repassivated easily, crevice corrosion events were the last to repassivate. Open circuit potential measurements showed the presence of meta-stable pitting at chloride concentrations of 0.3M. The lifetime and magnitude of these metastable pits was reduced on the addition of 0.05M chromate buffer.
- Research Organization:
- Brookhaven National Lab., Upton, NY (US)
- Sponsoring Organization:
- US Department of Energy (US)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 6247
- Report Number(s):
- BNL-66152; KC-02-01-02; KC-02-01-02
- Country of Publication:
- United States
- Language:
- English
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