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Amaghionyeodiwe, C. A.
Department of Mechanical Engineering, College of Engineering and Engineering Technology, Michael Okpara University of Agriculture, Umudike, Nigeria
Igboayaka, E. C.
Department of Mechanical Engineering, College of Engineering and Engineering Technology, Michael Okpara University of Agriculture, Umudike, Nigeria
Onwubali, W. U.
Department of Mechanical Engineering, College of Engineering and Engineering Technology, Michael Okpara University of Agriculture, Umudike, Nigeria
ABSTRACT
Soil corrosivity and cathodic protection of
buried-carbon steel pipe at two locations beside the workshop building that are
10metres apart of Michael Okpara University of Agriculture, Umudike was
investigated. The objective is to ascertain whether the soil physicochemical
characteristics and resistivity support the corrosion of the buried carbon steel in two locations of the study area. The
chemical properties considered include pH value, chloride and sulphate content
while the physical property investigated is the moisture content. Result shows
that the pH values
range from 5.27 to 6.13 and 4.19 to 5.22 for locations A and B, respectively
indicating acidity. The chloride content of site A ranges from 43mg/l to 109
mg/l while that attributed to site B ranges from 103 mg/l to 134 mg/l. The
overall sulphate content ranges from 36 mg/l to 93 mg/l indicating mild
corrosivity of the soil sample while the moisture content ranges from 8.11% to
12.02% for sample site A and 12.38% to 14.90% for sample site B. The soil
samples contained less than 40% moisture content which is assumed to be mildly
corrosive and less corrosive nature towards the buried carbon steel pipe. The
soil resistivity of the soil sample ranges between 13.2575 to 304146 indicating the
corrosive nature of the soil. The buried carbon steel was polarized within the
potential ranging from –860 and –1080 within 20weeks
of observation. Thus, sacrificial anode cathodic protection (SACP) technique is suitable for the cathodic protection of
the buried mild steel pipe.
Keywords: soil corrosivity, cathodic protection, moisture content, pipeline
https://doi.org/10.33922/j.ujet_v7i1_9
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Published
Tuesday, June 01, 2021
Issue
Vol. 7 No. 1, June 2021
Article Section
GENERAL
The contents of the articles are the sole opinion of the author(s) and not of UJET.
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