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The Role of Carbon Steel Corrosion Process on CaCO 3 Scaling in Deoxidized Oilfield Injection Water
Author(s) -
Pang Lin,
Zheng Yugui,
Chang Ming,
Wang Zhengbin
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202002489
Subject(s) - corrosion , scaling , cathodic protection , carbon steel , polarization (electrochemistry) , anode , electrochemistry , materials science , saturation (graph theory) , diffusion , metallurgy , inorganic chemistry , chemistry , electrode , thermodynamics , geometry , mathematics , combinatorics , physics
The influencing mechanism of the cathodic and anodic reactions in the corrosion process of carbon steel on CaCO 3 scaling was studied by galvanostatic polarization, and explained by potentiodynamic polarization, and electrochemical calculation mathematical analysis on the Oddo‐Tomson saturation index. The results reveal that the increased local pH caused by the higher cathodic current density is the only reason for enhanced CaCO 3 scaling. A critical corrosion rate due to the diffusion effect of OH − , above which the corrosion process can enhance the CaCO 3 scaling is reported. This research highlights the practical significance of corrosion related critical phenomenon for CaCO 3 scaling in the deoxidized oilfield injection water system.