1. Department
of Petroleum Engineering, Curtin University, GPO Box U1987, Perth, Western
Australia 6845, Australia
2. Gas Measurement & Auditing Pty Ltd, P.O. Box 458, Kalamunda, Perth, Western Australia 6926, Australia
3. Curtin
Corrosion Engineering Industry Centre, Curtin University, GPO Box U1987, Perth, Western Australia 6845, Australia