Title:
Microbially Induced Corrosion: Mechanisms and a Discussion of Standardized Testing Uses and Limitations
Author(s):
Jason Weiss
Publication:
Web Session
Volume:
ws_S21_Weiss.pdf
Issue:
Appears on pages(s):
Keywords:
DOI:
Date:
4/1/2021
Abstract:
This presentation discusses microbially induced corrosion (MIC) of concrete products. Specifically, it outlines that this is a three-stage process and discusses recent developments of a standard guide and laboratory test methods for determining the resistance of concrete to MIC. The three-stage process includes the reduction in pH (Stage I) (e.g., pH > 9-10), the attachment of biofilms which further lowers the pH (stage II) (e.g., 9-10 > pH > 4-6) and eventual deterioration due to biogenic acid exposure (Stage III) (e.g., < ~4 pH). Although the guide is intended for concrete products, it also covers specialized products. The presentation will discuss coming tests as well as limitations of tests.