- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
Variable Conditions Effect On Polarization Parameters Of Impressed Current Cathodic Protection Of Low Carbon Steel Pipes | ||
| Engineering and Technology Journal | ||
| Article 1, Volume 26, Issue 6, 2008, Pages 636-647 PDF (298.63 K) | ||
| DOI: 10.30684/etj.29.6.5 | ||
| Authors | ||
| Sami Abulnoun Ajeel; Ghalib A. Ali | ||
| Abstract | ||
| Cathodic protection is an effective electrochemical technique for preventing corrosion of metallic structures. It has widespread applications on various structures, suffering serious problems of corrosion in the environments. The main problem with this protection method is to determine the parameters (current density and potential). The previous works in this area used classical statistical methods to determine these parameters. In order to determine the cathodic protection potential, it is important to deal with the electrochemical studies of open circuit potential (OCP) and polarization investigations of low carbon steel used in pipeline application in 3.5 % NaCl solution at temperature range( 30- 50°C).These studies define the corrosion potential and also help one to understand the corrosion behavior of the used metal (low carbon steel ). This system was used to investigate the influence of various conditions on the minimum cathodic protection current that would provide a full cathodic protection for steel tube immersed in sea water. The variable conditions studied are concentration of (0.01 – 3.5) % NaCl , temperature (30- 50°C), distance between pipe (cathode) and graphite electrode ( anode ) of (10 – 20) cm and pH solution of (5.0 – 9.0) using a selected range of these conditions, the experimental results for the minimum cathodic protection current were obtained and recorded. The electrochemical results show that cathodic protection current density increases with increasing temperature and concentration. The current density also slightly increases with increase distance between cathode and anode. The effective sequence of these parameters on cathodic current density is as follows: Temperature > concentration > pH solution > cathode – anode distance . | ||
|
Statistics Article View: 407 PDF Download: 274 |
||