Modelagem da nucleação de pites no processo de corrosão de ligas metálicas / Modeling of pits nucleation in the process of corrosion of metallic alloys

AUTOR(ES)

Alessandra Ferreira

DATA DE PUBLICAÇÃO

2006

RESUMO

In the present work a computational model of the pitting corrosion process in stainless steal is developed. A computational program was implemented for the determination of the distribution of the local concentration of aggressive species, the degree of the passive film damage, the susceptibility of pitting and the pitting distribution, based on the PUNCKT et al. [2004] model. As a contribution of the present work dependence between the local concentration of aggressive species and the simulated anodic current is considered. It was also considered, as another contribution, the existence of stable pits and the deterministic effect of regions of MnS inclusions in stainless steel. The generation of pits over a metallic surface is modeled using a random process of pits nucleation, and the mathematical model solution gives the corroded surface visualization.

ASSUNTO(S)

simulation methods aço inoxidável - corrosão stainless steel - corrosion pitting corrosion simulação computacional matematica aplicada computer simulation métodos de simulação corrosão por pites

Documentos Relacionados

• "Synthesis and characterization of polyaniline mixed in different polymeric matrices for protection against corrosion of metallic alloys"
• Modelagem computacional da corrosão por pites em aço inoxidável: efeito do potencial e de inclusões de MnS
• Obtenção de ligas amorfas em volume : aplicações a ligas metalicas e a compostos intermetalicos magnetocaloricos
• Simulação e análise de gradientes de tensão em materiais e ligas metálicas
• Nucleation and growth of austenite/VC eutectic in alloys of the Fe-V-C system.