Repassivation of 13% Cr steel dependent on brine pH
Journal Article
·
· Materials Performance
OSTI ID:20017434
A joint laboratory project, involving an oil production and oil well service company, investigated repassivation of martensitic 13% Cr steel. The rate at which this alloy is repassivated after losing its protective passive oxide layer to hydrochloric acid (HCI) depended on the pH of the spent acid returns. Test samples of 13% Cr cut from oilfield tubing were subjected to a fluid sequence of (1) initial brine, (2) HCI, (3) spent acid, and (4) final brine. In 9 days, the samples regained their passive oxide layers. When spent acid was taken out of the fluid sequence, the samples regained passive oxide layers in 3 days.
- Research Organization:
- Chevron Research Technology Co. (US)
- OSTI ID:
- 20017434
- Journal Information:
- Materials Performance, Vol. 39, Issue 2; Other Information: PBD: Feb 2000; ISSN 0094-1492
- Country of Publication:
- United States
- Language:
- English
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