Peridynamic Simulation of Crevice Corrosion in a Titanium Alloy upon Exposure to a Marine Environment

Lv, Shengli; Wang, Yvmin; Zhang, Wei; Gao, Xiaosheng; Srivatsan, T. S.

doi:10.1007/s11665-023-07941-2

Cited by 2 publications

(2 citation statements)

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“…In the corrosive environment of completion fluid containing CO2, the surface of TC4 alloy has no crack perpendicular to the stress resistance direction, so it has good anti-stress corrosion cracking performance [13]. But the uniform corrosion rate of TC4 alloy can reach 0.4247 mm/a at 180 o C, as reference standard NACE SP0775-2013 degree of corrosion on the titanium alloy in this environment, and TC4 alloy suffered from more severe corrosion, its surface was covered with a layer of green corrosion product layer or sediment layer, and the green sediment loss was serious, and corrosion and pitting and dissolution phenomenon was obvious [14][15][16].…”

Section: ) Completion Fluidmentioning

confidence: 99%

“…2) Formation water In the corrosive environment of formation water containing CO2, TC4 alloy has good anti-stress corrosion cracking performance without cracks on the surface perpendicular to the direction of stress resistance [13]. In the corrosive environment of the formation water containing CO2 at 180 o C, the uniform corrosion rate was only 0.0004 mm/a.…”

Section: ) Completion Fluidmentioning

confidence: 99%

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Corrosion Behavior on Titanium Alloys as OCTG in Oil Fields

Wang

Zhu

Liu

et al. 2021

MSF

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Titanium alloys have been taken as Oil Country Tubular Goods (OCTG) owing to their higher strength, and better corrosion resistance, but there are some problems in their application process. The corrosion types of titanium alloys were emphatically discussed, and corrosion mechanism was analyzed in this paper. The results showed that the main corrosion type of titanium alloys in hydrochloric acid was pitting, and the surface roughness of titanium alloys could affect it. The critical current density of titanium alloys in phosphoric acid was closely related to temperature and phosphoric acid concentration. The passivation of titanium alloys could be carried out by the growing oxide film at low current density, to achieve the higher stability of passivating film in the concentrated sulfuric acid. Titanium alloys suffered from more serious corrosion in the CO2-containing completion fluid environment than that in the CO2-containing formation water environment. H2S would cause electrochemical corrosion and stress corrosion of titanium alloy pipe, leading to hydrogen embrittlement and even cracking of OCTG. Passivating film was the key to corrosion resistance of titanium alloys, and its composition would change with the depth of the film, presenting N-type. The dynamic corrosion of titanium alloys was mainly controlled by charge transfer.

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Section: ) Completion Fluidmentioning

confidence: 99%

Section: ) Completion Fluidmentioning

confidence: 99%