EIS Study of Soil Corrosivity

2019 ◽  
Vol 11 (18) ◽  
pp. 35-40 ◽  
Author(s):  
Sabrina Silva ◽  
Luís Frederico P. Dick
Keyword(s):  
Soil Corrosivity

Assessing Soil Corrosivity for Buried Structural Steel

2021 ◽  
Author(s):  
Yannick Beauregard ◽  
Andrea Mah
Keyword(s):  
Structural Steel ◽  
Soil Corrosivity

scholarly journals Soil corrosivity and aquifer protective capacity of overburden units in Ado-Ekiti, southwestern Nigeria

2018 ◽  
Vol 65 (1) ◽  
pp. 45-58
Author(s):  
A.A. Oyedele ◽  
G.M. Olayanju ◽  
A.O. Talabi ◽  
S.N. Ogunyebi ◽  
O.F. Ojo
Keyword(s):  
Complex Terrain ◽  
Physicochemical Analysis ◽  
Central Portion ◽  
Protective Capacity ◽  
Basement Complex ◽  
Southwestern Nigeria ◽  
Longitudinal Conductance ◽  
North Eastern ◽  
Electrical Sounding ◽  
Soil Corrosivity

AbstractVertical electrical sounding, well inventory and physicochemical analysis were conducted to evaluate soil corrosivity and aquifer protective capacity of overburden units in the basement complex terrain of Ado-Ekiti, southwestern Nigeria. The topsoil is composed of slightly corrosive materials at the eastern, southern and northeastern flanks and the central portion with resistivity values ranging from 60 to 180 Ωm. Moderately corrosive/slightly corrosive materials (with resistivity values of 10 < ρ < 60 Ωm) constitute the second layer around the eastern, southern and north-eastern flanks. Pockets of areas in the northwestern, southeastern, eastern and central parts of the metropolis are practically non-corrosive with resistivity values in excess of 200 Ωm. Zones of good, moderate, weak and poor overburden protective capacity were delineated, with longitudinal conductance (S) values of 0.7 < S < 4.9, 0.2 < S < 0.69, 0.1 < S < 0.19 and S < 0.1 mhos, respectively. On a regional consideration, 23.31%, 18.80% and 57.9% of the study area is characterised by overburden materials of poor, weak and moderate protective capacity, respectively. Only 6.02% of the area indicates good overburden protective capacity.

scholarly journals Evaluation of groundwater supply potential from hydraulic parameters estimated from vertical electrical sounding (VES) in Ikeduru, south east Nigeria

2019 ◽  
Vol 7 (1) ◽  
pp. 67
Author(s):  
Nwosu Jacinta Chiemela ◽  
Leonard I Nwosu ◽  
Godwin O Chukwu
Keyword(s):  
Apparent Resistivity ◽  
Groundwater Exploration ◽  
Hydraulic Parameters ◽  
Protective Capacity ◽  
Resistivity Sounding ◽  
Groundwater Supply ◽  
Electrical Sounding ◽  
Supply Potential ◽  
Soil Corrosivity ◽  
Very High

A Vertical Electrical resistivity Sounding (VES) survey was carried out, to study the groundwater supply potential, protective capacity and soil corrosivity of aquifers in Ikeduru Local Government Area of Imo state, Nigeria. A total of ten (10) geoelectric soundings were acquired. Schlumberger electrode configuration was used in acquiring the data. Six to seven geoelectric layers were delineated from the interpreted results, the Aquifers were delineated between the fifth and sixth geoelectric layers, having an apparent resistivity above 1000Ωm, with the highest thick of 69.0m at a depth of 144.0m. Longitudinal Conductance, Hydraulic Conductivity, Transmissivity and Product Conductance range are as followings for the aquifers; 1.720 – 127.000 x 10-3Ω-1, 15.90 – 188.79m/day, 1093.3 – 1097.1m2/day and 2.590 – 252.50 x 10-3 respectively. Inferring from our hydraulic parameters, all the aquiferous zones have very high designation, wwithdrawal of great regional importance of groundwater supply potential and practically noncorrosive, soil corrosivity. 40% percentage of the aquiferous units have very good protective capacity, while for excellent and good protective capacity of the study are is 30%. All the VES points are said to be a very viable potential for safe source for groundwater exploration.  

Erratum: “A New Probe for the Investigation of Soil Corrosivity” (Vol. 57, No. 10, p. 913–917)

CORROSION ◽  
2001 ◽  
Vol 57 (12) ◽  
pp. 1092-1092
Author(s):  
M. C. Li ◽  
Z. Han ◽  
H. C. Lin ◽  
C. N. Cao
Keyword(s):  
Soil Corrosivity

A New Test for Estimating Soil Corrosivity Based on Investigation Of Metal Highway Culverts

CORROSION ◽  
1961 ◽  
Vol 17 (10) ◽  
pp. 493t-496t ◽  
Author(s):  
R. F. STRATFULL
Keyword(s):  
Statistical Analysis ◽  
Test Method ◽  
The Other ◽  
Reliable Indicator ◽  
Soil Resistivity ◽  
Corrosion Rates ◽  
Soil Corrosivity ◽  
Pipe Lines

Abstract Corrosion rates of several thousand metal highway culverts buried in California soils were studied with respect to soil resistivity and pH. From this relationship a new test method was derived to estimate soil corrosivity. Statistical analysis was used to compare the accuracy of this method of estimating soil corrosivity with other known methods. It was found that within limits this new test method was a more reliable indicator of relative soil corrosivity than any of the other investigated methods. It was thought, though, that this method might not prove so effective in predicting corrosion for long pipe lines nor for estimating soil corrosivity in certain geographical areas. 4.5.3

Performance and Integrity Issues for Composite Reinforced Steel Pipelines With Cathodic Protection

2010 ◽  
Author(s):  
Robert A. Denzine ◽  
Davion M. Hill
Keyword(s):  
Cathodic Protection ◽  
Composite System ◽  
Metal Composite ◽  
Composite Repair ◽  
Reinforced Steel ◽  
Point Bend ◽  
Soil Corrosivity ◽  
Corrosive Environments ◽  
Composite Repairs

Composites have seen increased usage for repair of pipelines. The performance of the entire metal-composite system has not been extensively addressed with regard to corrosion of the substrate and adhesion loss when the conditions are wet and the substrate is cathodically protected. In this work we have investigated the influence of corrosive environments on the performance of composite repair systems for pipelines. Earlier in this work we used FEA models to evaluate a composite patch for pipelines and the present research includes the experimental results for both patch and full-wrap composite repairs in simulated and field environments. The effect of impacts, cathodic protection, long term immersion, and soil corrosivity have been investigated by monitoring variables related to potential and conductivity of the electrolyte. We have also tested mechanical properties via four point bend on specimens intentionally exposed to ASTM cathodic disbondment tests. We have also evaluated the performance of these repairs in a modified ASTM G8 cathodic disbondment test with the addition of high pressure cyclic loading. By monitoring these variables, loss of adhesion and integrity in the composite-metal system is addressed.

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