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On the optimum soil moisture for underground corrosion in different soil types

journal contribution
posted on 2023-10-26, 03:25 authored by RM Azoor, RN Deo, N Birbilis, J Kodikara
Corrosion rates in sand, silt, and clay were investigated at various degrees of saturation (Sr) revealing that all three soil types have a distinct optimum Sr at which the corrosion rate is maximised. Sand, silt, and clay showed maximum corrosion currents at Sr ≈0.5, Sr ≈0.7, and Sr ≈0.8 respectively. We show that the optimum moisture level at which the corrosion rate becomes a maximum for a given soil type corresponds to the air transition point related to its water retention curve. We provide an explanation for this phenomenon elucidating previous observations, and highlight implications to current engineering practice.

History

Journal

Corrosion Science

Volume

159

Article number

ARTN 108116

Location

Amsterdam, The Netherlands

ISSN

0010-938X

eISSN

1879-0496

Language

English

Publication classification

C1.1 Refereed article in a scholarly journal

Publisher

PERGAMON-ELSEVIER SCIENCE LTD