Study of lubricants and their effect on the anti-corrosion performance as temporarily protective oil coatings

A wire beam electrode composed of mild steel wires was developed and used to study the lubricants and their effect on the anti-corrosion performance as temporarily protective oil coatings. Three types of lubricant, which contained 5% sodium silicate, triethanolamine and sodium nitrite, respectively, were studied in this paper. The influence of a lubricant on the anticorrosion ability as temporarily protective oil coatings were studied and evaluated by using a wire beam electrode to measure the change of corrosion potential and its standard deviations varying with immersion time. Two criteria were used to evaluate the characteristics of the lubricants; one was whether or not the lubricant might change the distribution of corrosion potentials of an oil-coated electrode, the other was whether or not the lubricant was beneficial to the homogeneous distribution of corrosion potentials of an oil-coated electrode.