Effects of Hydrogen and Chloride Ions on Automobile Interstitial-Free Steel Corrosion

Abstract

Effects of hydrogen and chloride ions on the corrosion behavior of interstitial-free steel were investigated. The anodic polarization tests show that the corrosion and pitting potentials decrease with the rise of both the charging current density and the chloride ions concentration. For a given chloride ion concentration, the increase of the charging current density makes the pitting and the corrosion potentials drop sharply. Under a given hydrogen charging current density, the drops of the pitting and corrosion potentials have an approximately linear relationship with the increase of the chloride ions' concentration. It indicates that the hydrogen and chloride ions can affect the corrosion behavior. From the salt fog tests, the growth and development of the rust and pits on the hydrogencharged specimen are faster than that of the uncharged one, displaying that hydrogen can decrease the corrosion resistance in the chloride ions' environment.

The electrochemical behavior and characteristic of passive film on 2205 duplex stainless steel under various hydrogen charging conditions

“…The chloride ions narrowed the passivation region and improved pitting susceptibility [22,23]. Experimental evidence indicated that there was a synergic effect between hydrogen and chloride ions [24]. Yang et al [25,26] found that the critical chloride concentration for the film breakdown decreased with the charging process and hydrogen also hindered the repassivation process once the film was broken down.…”

In situ analysis of dynamic laminar flow extraction using surface-enhanced Raman spectroscopy

“…Chloride ions, a widespread contaminant in crude oil, are a corrosive substance for oil refineries 1 . To prolong the lifespan of refining equipment, facilities employ a water extraction technique, which exploits solubility differences, to remove chloride ions from the crude oil.…”