Analysis of Corrosion about Carbon Food Processing Steel by SEM Image and EDS Spectrum

Abstract

Corrosion was observed on the roller of a food machine which was used to make dumpling and wonton. The aim of the present work was to investigate the corrosion causes and mechanisms of the food machine. We investigated the corrosion causes by visual observation, analyzing corrosion products, and detecting the presence of microorganisms. We found that the corrosion was caused by Cl- and sulfate reducing bacteria (SRB). Cl- was from food raw materials. Food residues provided conditions for microbial production and growth. Corrosion mechanism was analyzed, and proposals were put forward to the manufacturer and user of the food machine.