inhibitors

Сorrosion protection with the help of inhibitors from renewable raw materials. Review

The article provides information about corrosion problems in the oil refining industry and the scale of losses associated with it. The causes of corrosion associated with the presence of sulfur compounds, hydrochloric acid and chlorides, naphthenic acids, etc. in oil are described. A set of methods aimed at reducing the corrosion effect of these components is given. The use of inhibitors is one of the most effective and widespread such methods. The use of corrosion inhibitors from renewable raw materials is becoming more and more popular.

Synergistic Effect of BaCl2 on Corrosion Inhibition of Copper by Mentha Spicata Oil in 1M Nitric Acid: Gravimetric and Raman Spectroscopy Studies

The effect of Mentha Spicata oil and the mixture of BaCl2 and Mentha Spicata oil on corrosion of copper in 1M HNO3 have been investigated using weight loss methods and Raman spectroscopy. The study revealed that copper is more efficiently inhibited by Mentha Spicata oil in the presence of BaCl2 than pure oil. The inhibition efficiencies increased with increased concentration of the additives. The highest inhibition efficiency of 56.12 % was observed with single Mentha Spicata oil.

Aminooxoethylpyridinium Chlorides as Inhibitors of Mild Steel Acid Corrosion

Aminooxoethylpyridinium chlorides under the St3ps steel corrosion in acid hydrochloric and sulfuric solutions demonstrate the inhibition efficiency at 98 %. The compound with hydrazinocarbonyl and 2,3- dimethylphenyl fragments turns out to be the most effective within the interval 293–333 К. This inhibitor is also characterized by a significant aftereffect due to the chemisorption on the steel surface.

Biocorrosion of metal sewage treatment constructions and its inhibition with pyridinium chlorides

On the metal sewage treatment constructions (Chernihiv, Ukraine) a biofilm is formed, which is corrosive because of the number of sulfate-reducing bacteria (107 cell/cm2). By affecting sulfate-reducing activity of microorganisms, pyridinium chlorides at the concentration of 0.5 g/l were revealed to provide St3ps steel inhibition efficiency of up to 98.7 % under the corrosion caused by biofilm bacteria.