Abstract
The nature of the species in solution plays a major role on the effectiveness of the corrosion inhibitor on a steel substrate. The speciation of lanthanum 4-hydroxy cinnamate (La(4OH-Cin) 3) in solution has been evaluated using experimental techniques composed of potentiodynamic polarisation, immersion tests, nuclear magnetic spectroscopy and mass spectroscopy. It is evident that the species in solution are dependent on pH and this impacts the corrosion inhibition mechanism and the efficiency. It was found that at a neutral pH of 5.5 the La(4OH-Cin) 3 behaves as a strong anodic inhibitor. Whereas, when the pH shifts to low (pH2.5) and/or high (pH8) the corrosion mechanism changes.
Original language | English |
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Title of host publication | 18th International Corrosion Congress 2011 |
Subtitle of host publication | 20-24 November 2011; Perth, Australia |
Place of Publication | Blackburn VIC Australia |
Publisher | Australasian Corrosion Association (ACA) |
Pages | 1776-1786 |
Number of pages | 11 |
Volume | 3 |
ISBN (Print) | 9781618393630 |
Publication status | Published - 2011 |
Externally published | Yes |
Event | International Corrosion Congress 2011 - Perth Convention and Exhibition Centre, Perth, Australia Duration: 20 Nov 2011 → 24 Nov 2011 Conference number: 18th |
Conference
Conference | International Corrosion Congress 2011 |
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Abbreviated title | ICC 2011 |
Country/Territory | Australia |
City | Perth |
Period | 20/11/11 → 24/11/11 |
Other | The 18th International Corrosion Congress took place between the 20th and the 24th November 2011 in the Perth Convention and Exhibition Centre, Australia. The International Corrosion Congress is the major event of the International Corrosion Council (ICC), an international body founded to advance corrosion science and engineering and is held once every three years by different host countries. |
Keywords
- Carboxylates
- Corrosion inhibition
- Electrochemistry
- Lanthanum
- Mass spectrometry
- Nuclear magnetic spectroscopy