Repassivation of 13Cr after acidizing: Electrochemical investigation of oxidizing solutions
- Halliburton Energy Services, Duncan, OK (United States)
Electrochemical studies and solution ion analyses have been performed on 1 3Cr steel to determine the efficacy of minimizing corrosion following an HCI acid stimulation treatment by the introduction of an oxidizing fluid to repassivate the surface. The three-fluid sequence utilized consisted of an acid stage, a passivating fluid, and finally a spent-acid stage. Several oxidizing solutions were tested, including nitric acid, chromate, molybdate, carbonate, and nitrite solutions. Variations of the Navy solution, an aqueous solution of 0.5% NaNO{sub 2}/0.25% Na{sub 2}HPO{sub 4}/0.25% NaH{sub 2}PO{sub 4}, were also attempted. Although several oxidizing solutions did successfully passivate 13Cr following the acid treatment, with the best results coming from 1 % Na{sub 2}CrO{sub 4}, 1 and 5% Na{sub 2}MoO{sub 4} and 1% Na{sub 2}CO{sub 3}/0.125% Na{sub 3}PO{sub 4} solutions, none proved resistant to the subsequent spent-acid solution.
- OSTI ID:
- 70072
- Report Number(s):
- CONF-940222-; TRN: IM9529%%411
- Resource Relation:
- Conference: Corrosion 94: National Association of Corrosion Engineers (NACE) international annual conference, Baltimore, MD (United States), 28 Feb - 4 Mar 1994; Other Information: PBD: 1994; Related Information: Is Part Of Corrosion/94 conference papers; PB: 5005 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
On the repassivation behavior of high-purity titanium and selected {alpha}, {beta}, and {beta} + {alpha} titanium alloys in aqueous chloride solutions
Corrosion and repassivation of Super 13Cr stainless steel in artificial 1D pit electrodes at elevated temperature