Flow Accelerated Corrosion of Low Alloy Steel in Weak Alkaline Solution characterized by Electrochemical Method
Creators
- 1. KAIST, Daejeon (Korea, Republic of)
- 2. Korea Electric Power Research Institute, Daejeon (Korea, Republic of)
Description
Flow-Accelerated Corrosion behavior concerning both activation and mass transfer process of low alloy steel was studied using rotating cylinder electrode in mild alkaline solution by DC and AC electrochemical techniques at ambient temperature. Passive film was formed from pH 9.8 by step oxidation of ferrous product into hydroxyl compound. Corrosion potential shifted slightly upward with rotating velocity by the diffusion mechanism of cathodic species. Corrosion current density increased with rotating velocity in neutral solution. Meanwhile, limiting current increased with rotating speed irrespective of pH values. It seems that activation process, which represents formation of passive film on the bare metal surface, controls the entire corrosion kinetics in this study
Additional details
Publishing Information
- Journal Title
- Journal of the Corrosion Science Society of Korea
- Journal Volume
- 30
- Journal Issue
- 6
- Series
- 17 refs, 10 figs, 3 tabs
- Journal Page Range
- p. 302-309
- ISSN
- 0253-312X
INIS
- Country of Publication
- Korea, Republic of
- Country of Input or Organization
- Korea, Republic of
- INIS RN
- 45012464
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- CORROSION; CURRENT DENSITY; DIFFUSION; KINETICS; LOW ALLOY STEELS; MASS TRANSFER; OXIDATION; PH VALUE; VELOCITY
- Descriptors DEC
- ALLOYS; CARBON ADDITIONS; CHEMICAL REACTIONS; IRON ALLOYS; IRON BASE ALLOYS; STEELS; TRANSITION ELEMENT ALLOYS