Electrochemical Noise - Ready for Monitoring of the Corrosiveness of Soils in the Field

Keywords-electrochemical noise; data evaluation software; noise current densities; handheld potentiostat/galvanostat; field measurements; soil corrosiveness; INTRODUCTION The "DVGW(1) - German Technical and Scientific Association for Gas and Water" is a recognized standardization body in G...

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Bibliographic Details
Published inNACE International Corrosion Conference Proceedings pp. 1 - 13
Main Authors Schmitt, Guenter, Schrems, Peter, Kuhl, Lars
Format Conference Proceeding
LanguageEnglish
Published Houston NACE International 01.01.2018
Subjects
Alloying
Batteries
Bicarbonates
Buried pipes
Cathodic protection
Containers
Corrosion
Corrosion prevention
Corrosion rate
Discount coupons
Electrical resistivity
Electrochemical noise
Electrodes
Gas pipelines
Laboratories
Natural gas
Noise
Noise monitoring
Process controls
Research projects
Sensors
Software
Soil analysis
Soil water
Soils
Standardization
Steel
Water pipelines
Germany
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Summary:Keywords-electrochemical noise; data evaluation software; noise current densities; handheld potentiostat/galvanostat; field measurements; soil corrosiveness; INTRODUCTION The "DVGW(1) - German Technical and Scientific Association for Gas and Water" is a recognized standardization body in Germany for the gas and water industry, a center for technical know-how in the gas and water sectors and an initiator and promotor of research projects and innovation in this field. Detection, assessment and recommendations for assessing the corrosiveness of soils directly in the field" 1 was developed as a guideline document to foster the preparation of a land registry with local indication of soil corrosiveness, in order to enable communities and pipeline owners to take appropriate corrosion protection measures when laying non-cathodically protected gas or water pipelines in the soil. In Germany the corrosiveness of soils is generally assessed using DVGW-Worksheet No. 9, "Assessment of corrosion impact on buried pipelines and containers made of unalloyed and low alloyed iron materials in soils".2 From analytical data of a soil, including electrical conductivity, pH, content of chlorides, sulfates and bicarbonates, etc., rating numbers are formed which assign the soil of interest to a class of soils and, hence, to a level of corrosiveness according to DIN(1) 50929, Part 3 (Table 1). Furthermore, the soil rating numbers give only very rough information on the effective corrosion rate of the buried steel. [...]methods are needed that yield corrosion information in shorter times with more accurate quantification of corrosion rate ranges and can be applied in the field, e.g. directly in the pipe trench.