Publication

Study of rust morphology, contamination and porosity by backscattered electron imaging

1995
Journal Articles

Abstract

This work explores the potential of backscattered electron (BSE) imaging as a tool for the study of atmospheric corrosion. The sensitivity of the backscattered signal to small differences in average atomic number and variations in microporosity, allows study of the discontinuous nature of the atmospheric corrosion process and the distribution of contaminants in the corrosion product layers. Quantitative image analysis of BSE images has also been used to characterize the compactness of rust layers.

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1995
Journal Articles

Abstract

Official source

Related concepts (32)

Corrosion

Corrosion is a natural process that converts a refined metal into a more chemically stable oxide. It is the gradual deterioration of materials (usually a metal) by chemical or electrochemical reaction with their environment. Corrosion engineering is the field dedicated to controlling and preventing corrosion. In the most common use of the word, this means electrochemical oxidation of metal in reaction with an oxidant such as oxygen, hydrogen or hydroxide. Rusting, the formation of iron oxides, is a well-known example of electrochemical corrosion.

Corrosion engineering

Corrosion engineering is an engineering specialty that applies scientific, technical, engineering skills, and knowledge of natural laws and physical resources to design and implement materials, structures, devices, systems, and procedures to manage corrosion. From a holistic perspective, corrosion is the phenomenon of metals returning to the state they are found in nature. The driving force that causes metals to corrode is a consequence of their temporary existence in metallic form.

Pitting corrosion

Pitting corrosion, or pitting, is a form of extremely localized corrosion that leads to the random creation of small holes in metal. The driving power for pitting corrosion is the depassivation of a small area, which becomes anodic (oxidation reaction) while an unknown but potentially vast area becomes cathodic (reduction reaction), leading to very localized galvanic corrosion. The corrosion penetrates the mass of the metal, with a limited diffusion of ions.

Related publications (20)

Study of rust morphology, contamination and porosity by backscattered electron imaging

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