Study of the corrosion products formed on a multiphase CuAlBe alloy in a sodium chloride solution by micro-Raman and in situ AFM measurements

S. MONTECINOS; S. N. SIMISON

APPLIED SURFACE SCIENCE

ELSEVIER SCIENCE BV

Lugar: Amsterdam; Año: 2011 vol. 257 p. 7732 - 7738

0169-4332

The corrosion products formed on a multiphase Cu–11.40Al–0.55Be (wt.%) alloy in 3.5% NaCl at open circuit potential, and their evolution with immersion time were studied mainly by micro-Raman and in situ AFM measurements. The aluminium content of each phase affects the formation of the corrosion products on them. After 1 day of immersion, Gamma2 precipitates were more susceptible to dealuminization, while beta phase exhibited a high corrosion stability. The corrosion products evolved with immersion time, and CuCl2 and a Cu2O/CuO double layer film were the stable products formed on all the phases after long times.