Environmental factors in failure during structural steel hot-dip galvanizing 

Paper Info

Revista

Engineering Failure Analysis

Año de publicación

2009

Tematica

Materiales metálicos

Integridad estructural / análisis de fallo

Mecánica de fractura

Corrosión

Environmental factors in failure during structural steel hot-dip galvanizing 

Carpio, Jaime | Casado del Prado, José Antonio | Álvarez Laso, José Alberto | Gutiérrez-Solana Salcedo, Federico |

Abstract

This paper shows new achievements in the comprehension of failure mechanisms during structural steel hot-dip galvanizing. The problem and its evolution are explained through the microstructure and environmental factors that favour the structural steel embrittlement during galvanizing. These factors are the following: the stages prior to galvanizing process, which increase hydrogen concentration; the galvanizing temperature, 450 °C, which produces a decrease of mechanical properties; and the new low-melting-point elements added to the galvanizing baths, especially Sn and Bi, which can form eutectics with the traditional Pb at the steel crack tips

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