Abstract
The electrochemical behaviour of an austenitic stainless steel embedded in concrete containing various proportions (5%, 10%, 15%, 20% and 25%) of starch and cellulose admixtures in contact with one molar solution of sodium chloride was studied. The electrode potential measurements were determined using a digital voltmeter with zinc rod reference electrode. Surface passivation was observed at 10-20% starch content, while 5-10% cellulose admixture was required to enhance surface passivation of the reinforced austenitic stainless steel. The synergetic effect of the two admixtures occurred at 5% starch and 15% cellulose, and produced good film stability. These deductions were attributed to the alteration in the composition of the concrete medium, which was brought about by the replacement of hydroxyl group in the structures of the admixtures by the aggressive chloride ions. There was an excess hydroxyl group released into the concrete medium, which created an excess alkaline and passivating environment for the reinforcing austenitic stainless steel (ASS) within the concrete.
| Original language | English |
|---|---|
| Pages (from-to) | 22-28 |
| Number of pages | 7 |
| Journal | Construction and Building Materials |
| Volume | 42 |
| DOIs | |
| Publication status | Published - Feb 18 2013 |
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All Science Journal Classification (ASJC) codes
- Civil and Structural Engineering
- Building and Construction
- Materials Science(all)
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Electrochemical behaviour of an austenitic stainless steel reinforced concrete in the presence of starch and cellulose admixtures. / Ikotun, B. D.; Afolabi, A. S.
In: Construction and Building Materials, Vol. 42, 18.02.2013, p. 22-28.Research output: Contribution to journal › Article
TY - JOUR
T1 - Electrochemical behaviour of an austenitic stainless steel reinforced concrete in the presence of starch and cellulose admixtures
AU - Ikotun, B. D.
AU - Afolabi, A. S.
PY - 2013/2/18
Y1 - 2013/2/18
N2 - The electrochemical behaviour of an austenitic stainless steel embedded in concrete containing various proportions (5%, 10%, 15%, 20% and 25%) of starch and cellulose admixtures in contact with one molar solution of sodium chloride was studied. The electrode potential measurements were determined using a digital voltmeter with zinc rod reference electrode. Surface passivation was observed at 10-20% starch content, while 5-10% cellulose admixture was required to enhance surface passivation of the reinforced austenitic stainless steel. The synergetic effect of the two admixtures occurred at 5% starch and 15% cellulose, and produced good film stability. These deductions were attributed to the alteration in the composition of the concrete medium, which was brought about by the replacement of hydroxyl group in the structures of the admixtures by the aggressive chloride ions. There was an excess hydroxyl group released into the concrete medium, which created an excess alkaline and passivating environment for the reinforcing austenitic stainless steel (ASS) within the concrete.
AB - The electrochemical behaviour of an austenitic stainless steel embedded in concrete containing various proportions (5%, 10%, 15%, 20% and 25%) of starch and cellulose admixtures in contact with one molar solution of sodium chloride was studied. The electrode potential measurements were determined using a digital voltmeter with zinc rod reference electrode. Surface passivation was observed at 10-20% starch content, while 5-10% cellulose admixture was required to enhance surface passivation of the reinforced austenitic stainless steel. The synergetic effect of the two admixtures occurred at 5% starch and 15% cellulose, and produced good film stability. These deductions were attributed to the alteration in the composition of the concrete medium, which was brought about by the replacement of hydroxyl group in the structures of the admixtures by the aggressive chloride ions. There was an excess hydroxyl group released into the concrete medium, which created an excess alkaline and passivating environment for the reinforcing austenitic stainless steel (ASS) within the concrete.
UR - http://www.scopus.com/inward/record.url?scp=84873655806&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84873655806&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2012.12.063
DO - 10.1016/j.conbuildmat.2012.12.063
M3 - Article
VL - 42
SP - 22
EP - 28
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
ER -