Abstract
This study investigated Octadecyl Trimethyl Ammonium Chloride (OTAC) as a corrosion inhibitor for ASTM A106 Grade B steel in 3.0 wt% NaCl purged with 1 bar CO2. Temperature variation of 40°C and 90°C and inhibitor different concentrations were applied. The examination engaged potentiodynamic polarization technique. The data obtained became references in determining the adsorption isotherm type. Surface characterization exploiting a Scanning Electron Microscope (SEM) and an Energi Dispersive X-Ray Spectroscopy (EDS) helped discover the inhibition mechanism. Several results gained are as follows. First, the more the temperature increases, the more efficient the inhibitor is. Secondly, the inhibitor follows Langmuir’sadsorption isotherm while thevalue of adsorption surface energy (ΔG) indicates the adsorption mechanism takes place both chemically and physically. Last, the SEM-EDS analysis results in a large decline in oxygen, a main factor of sweet corrosion.
| Original language | English |
|---|---|
| Pages (from-to) | 23306-23314 |
| Number of pages | 9 |
| Journal | Test Engineering and Management |
| Volume | 83 |
| Publication status | Published - 1 Apr 2020 |
Keywords
- Adsorption
- Inhibitor
- Sweet Corrosion
- Quaternary Ammonium Chloride