Most studies on the corrosion inhibition performance of organic molecules and (nano)materials were conducted within “carbon steel/1.0 M HCl” solution system using similar experimental and theoretical methods. As such, the numerous research findings in this system are sufficient to conduct comparative studies to select the best-suited inhibitor type that generally refers to a type of inhibitor with low concentration/high inhibition efficiency, nontoxic properties, and a simple and cost-economic synthesis process. Before data collection, to help readers have a clear understanding of some crucial elements for the evaluation of corrosion inhibition performance, we introduced the mainstay of corrosion inhibitors studies involved, including the corrosion and inhibition mechanism of carbon steel/HCl solution systems, evaluation methods of corrosion inhibition efficiency, adsorption isotherm models, adsorption thermodynamic parameters QC calculations, MD/MC simulations, and the main characterization techniques used. In the classification and statistical analysis section, organic compounds or (nano)materials as corrosion inhibitors were classified into six types according to their molecular structural characteristics, molecular size, and compound source, including drug molecules, ionic liquids, surfactants, plant extracts, polymers, and polymeric nanoparticles. We outlined the important conclusions obtained from recent literature and listed the evaluation methods, characterization techniques, and contrastable experimental data of these types of inhibitors when used for carbon steel corrosion in 1.0 M HCl solution. Finally, statistical analysis was only performed based on these data from carbon steel/1.0 M HCl solution system, from which some conclusions can contribute to reducing the workload of the acquisition of useful information and provide some reference directions for the development of new corrosion inhibitors.

Coordination of Na₂SnO₃ with trace carboxymethyl chitosan contributes to standby protection and high utilization efficiency of the AZ61 anode.

C₆F₁₂O has the potential to be used in gas-insulated equipment because of its excellent insulation performance and low global warming potential value. In order to study the effect of O₂ on the decomposition characteristics of the C₆F₁₂O/CO₂ gas mixture, power frequency breakdown experiments were conducted on a C₆F₁₂O/O₂/CO₂ gas mixture with different O₂ mixing ratios. The decomposition products of the C₆F₁₂O gas mixture after multiple breakdowns were analyzed qualitatively and quantitatively by gas chromatography-mass spectrometry. The effects of the O₂ mixing ratio, breakdown times, and effective gas production rate on the decomposition characteristics of the gas mixture were investigated. The results show that the main decomposition products are CF₄, C₂F₆, C₃F₆, C₃F₈, C₄F₁₀, C₅F₁₂, C₃F₇H, and CF₂O, and the addition of O₂ will promote the formation of the above several decomposition products. Except for C₃F₆, the concentrations of other decomposition products tend to increase and then decrease with the increase in the O₂ mixing ratio. The concentrations of CF₄, C₂F₆, C₃F₆, and C₃F₈ increase with the times of breakdowns. The effective gas production rates of CF₄, C₂F₆, and C₃F₈ show a trend of increasing and then decreasing in the process of adding O₂ to the C₆F₁₂O/O₂/CO₂ gas mixture. This study provides a reference for the industrial application of the C₆F₁₂O/O₂/CO₂ gas mixture.

For partial discharge (PD) in transformer, every single detection method has its limitation and cannot solve all the problems perfectly. To overcome the limitation of single detection method and improve the reliability of partial discharge detection, this study proposed a diagnosis approach based on multi-detection technology fusion of Dissolved Gas Analysis (DGA), PD ultrasonic location and PD test of long-duration AC withstand voltage test. The effectiveness of the fusion detection method was confirmed by diagnosing of an internal discharge fault in a 110kV power transformer. Finally, preventive measures are presented, which give emphasis on manufacturing process, test results analysis, overhaul and examination, and so on.