The influence of adding corrosion inhibitor and pH on the electrochemical properties of hybrid films applied to galvanised steel

Abstract

This study was aimed at coating galvanised steel with a hybrid film obtained from a sol consisting of silane precursors 3 - (trimetoxisililpropil) methacrylate (TMSPMA) and tetraethoxysilane (TEOS). The pH of the hydrolysed-silane solution was 1 and 3. The influence of adding corrosion inhibitor (i.e. 0.01M cerium nitrate) was evaluated for all samples. The hybrid films were deposited by dip-coating. The film was characterised scanning electron microscopy (SEM), profilometry, contact angle measurement, potentiodynamic polarisation and electrochemical impedance spectroscopy. The results showed that solution pH influenced hybrid film formation and final surface properties. Additionally, cerium nitrate as corrosion inhibitor addition enhances corrosion resistance of the films.

Corrosion in Crude Oil Distillation Units (CDUs) and a Study of Reducing Its Rates by Changing Chemical Injection Sites

“…The results were reached in (site -2) within close limits to the previous time period after making a change in the injection site of the neutralizing amine, which is suggested by the research, as it will be, as we mentioned in the body of the research, in the return site from the stripper tower towards the main tower and as shown in the Figure (6) We will study the results and the differences through the results of Table (2).…”

“…Studies show that dissolved salts and hydrochloric acid form different forms of corrosion in distillation tower metal, depending on the temperature gradient (boiling point values) and concentration. The wear of the oil and gas production tray area differs from that of Tray 24 and tray 28 as shown in Figure (2). Table ( 1) Also shows the areas and the cause of corrosion for each area.…”

“…The first stage is dealing with corrosion issues in the area where crude oil enters the refinery, i.e. when removing crude oil salts and reducing them, in addition to injecting caustic substances to convert unstable salts into relatively stable ones, while the second stage is represented in the area over head distillation tower and is represented by the injection of neutralizing amines and corrosion inhibitors to reduce corrosion rates [2].…”

pH Effect on Microbial Corrosion by <i>Pseudomonas aeruginosa Sp</i>. on Galvanized JIS3502 Steel

“…Thus, in environments containing bacteria, the corrosion behavior of materials may be different at different environmental conditions. Nevertheless, the recent literature focused mostly on the MIC behavior of galvanized steel at a neutral pH (pH 7) [11,12]. Several previous studies show that some Pseudomonas species activities are inhibited at pH below 7 while some others have the ability to grow well even in a very low pH environment [11].…”