Evaluation of N and S Codoped Carbon Dots as an Environment Friendly and High-Efficiency Inhibitor for X65 Steel in an Acidic Medium
Xin Zhang, Yu Zhang, Wenpo Li, Shengtao Zhang, Bochuan Tan, Weiping He, Yuanhai Liu, Chenyu Zhang
Abstract
The high content of nitrogen and sulfur-doped carbon dots (N, S-CDs) was designed to prevent the corrosion of X65 steel in an acidic medium. The corrosion-inhibiting abilities of related nanomaterials for X65 steel were acquired by electrochemical experiments, and the corroded products were investigated by FT-IR, XPS, and Raman analysis. The conclusions confirm that the N, S-CDs are a high-efficiency inhibitor. When the concentration is 200 mg/L, the inhibitive efficiency of X65 steel can reach up to 99.1% and it interacts with X65 steel through chemical and physical adsorption. Additionally, results from the spectroscopic studies show that the S-group is the main contributor to the chemical adsorption process.