Curcuminoid compounds isolated from curcuma domestica val. as corrosion inhibitor towards carbon steel in 1% NaCl solution
The corrosion inhibitor of carbon steel in 1% NaCl solution by curcuminoids has been studied at 27oC using weight loss and electrochemical method. The determination of corrosion inhibition efficiency (%eff) utilising weight loss method at the concentration of 80 ppm showed the best result of 78.70%...
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Universiti Kebangsaan Malaysia
2011
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| Online Access: | http://journalarticle.ukm.my/2634/ http://journalarticle.ukm.my/2634/ http://journalarticle.ukm.my/2634/1/10_Dias.pdf |
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ukm-26342016-12-14T06:32:12Z http://journalarticle.ukm.my/2634/ Curcuminoid compounds isolated from curcuma domestica val. as corrosion inhibitor towards carbon steel in 1% NaCl solution Dias Kandias, Bunbun Bundjali, Deana Wahyuningrum, The corrosion inhibitor of carbon steel in 1% NaCl solution by curcuminoids has been studied at 27oC using weight loss and electrochemical method. The determination of corrosion inhibition efficiency (%eff) utilising weight loss method at the concentration of 80 ppm showed the best result of 78.70% for third isolated fraction. Further determination utilising Tafel method showed the following results: raw pure extract of curcuminoid gave 89.88% at 50 ppm; the first isolated fraction gave 46.50% at 80 ppm; the second isolated fraction gave 44.83% at 30 ppm; and the third isolated fraction gave 92.44% at 70 ppm. Based on the analysis of Tafel extrapolation curve, the raw pure extract and the third fraction of curcuminoid acted as anodic inhibitor, whereas the first and the second fraction performed as cathodic inhibitors. The evaluations of synergism parameter (Sθ) indicate that the enhancement in inhibition efficiency towards raw pure extract was caused by the presence of second and third fractions as cathodic and anodic inhibitors. The contribution of steric hindrance of methoxy groups in curcuminoid structure causes the decrease in curcuminoid activity to be adsorbed on the electrode (carbon steel) surface. Universiti Kebangsaan Malaysia 2011-09 Article PeerReviewed application/pdf en http://journalarticle.ukm.my/2634/1/10_Dias.pdf Dias Kandias, and Bunbun Bundjali, and Deana Wahyuningrum, (2011) Curcuminoid compounds isolated from curcuma domestica val. as corrosion inhibitor towards carbon steel in 1% NaCl solution. Sains Malaysiana, 40 (9). pp. 1013-1018. ISSN 0126-6039 http:www.ukm.my/jsm/ |
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Digital Repository |
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Local University |
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Universiti Kebangasaan Malaysia |
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UKM Institutional Repository |
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Online Access |
| language |
English |
| description |
The corrosion inhibitor of carbon steel in 1% NaCl solution by curcuminoids has been studied at 27oC using weight loss and electrochemical method. The determination of corrosion inhibition efficiency (%eff) utilising weight loss method at the concentration of 80 ppm showed the best result of 78.70% for third isolated fraction. Further determination utilising Tafel method showed the following results: raw pure extract of curcuminoid gave 89.88% at 50 ppm; the first isolated fraction gave 46.50% at 80 ppm; the second isolated fraction gave 44.83% at 30 ppm; and the third isolated fraction gave 92.44% at 70 ppm. Based on the analysis of Tafel extrapolation curve, the raw pure extract and the third fraction of curcuminoid acted as anodic inhibitor, whereas the first and the second fraction performed as cathodic inhibitors. The evaluations of synergism parameter (Sθ) indicate that the enhancement in inhibition efficiency towards raw pure extract was caused by the presence of second and third fractions as cathodic and anodic inhibitors. The contribution of steric hindrance of methoxy groups in curcuminoid structure causes the decrease in curcuminoid activity to be adsorbed on the electrode (carbon steel) surface. |
| format |
Article |
| author |
Dias Kandias, Bunbun Bundjali, Deana Wahyuningrum, |
| spellingShingle |
Dias Kandias, Bunbun Bundjali, Deana Wahyuningrum, Curcuminoid compounds isolated from curcuma domestica val. as corrosion inhibitor towards carbon steel in 1% NaCl solution |
| author_facet |
Dias Kandias, Bunbun Bundjali, Deana Wahyuningrum, |
| author_sort |
Dias Kandias, |
| title |
Curcuminoid compounds isolated from curcuma domestica val. as corrosion inhibitor towards carbon steel in 1% NaCl solution |
| title_short |
Curcuminoid compounds isolated from curcuma domestica val. as corrosion inhibitor towards carbon steel in 1% NaCl solution |
| title_full |
Curcuminoid compounds isolated from curcuma domestica val. as corrosion inhibitor towards carbon steel in 1% NaCl solution |
| title_fullStr |
Curcuminoid compounds isolated from curcuma domestica val. as corrosion inhibitor towards carbon steel in 1% NaCl solution |
| title_full_unstemmed |
Curcuminoid compounds isolated from curcuma domestica val. as corrosion inhibitor towards carbon steel in 1% NaCl solution |
| title_sort |
curcuminoid compounds isolated from curcuma domestica val. as corrosion inhibitor towards carbon steel in 1% nacl solution |
| publisher |
Universiti Kebangsaan Malaysia |
| publishDate |
2011 |
| url |
http://journalarticle.ukm.my/2634/ http://journalarticle.ukm.my/2634/ http://journalarticle.ukm.my/2634/1/10_Dias.pdf |
| first_indexed |
2023-09-18T19:36:36Z |
| last_indexed |
2023-09-18T19:36:36Z |
| _version_ |
1777405312427360256 |