The electrochemical and corrosion behavior of austenitic stainless steel containing Cu

The effect of Cu addition on the electrochemical corrosion and passivation behavior of stainless steels

“…The mechanism of the beneficial effect of added Cu is attributed widely to the suppression of anodic dissolution by elemental copper deposition on the steel surface immersed in a corrosive medium [7][8][9][10]. A detrimental effect of Cu has also been observed and has been related to the stability of the deposited Cu in a given environment.…”

“…The effect of copper alloying on stainless steel passivation is neither uniform nor definite, and both beneficial and adverse effects [7][8][9][10] have been observed. For example, Postrach et al [13] reported an ambivalent effect of Cu in the passive state of Fe-Cr alloys in sulfuric acid.…”

“…Copper as an alloying element has been used to improve the general corrosion resistance of numerous stainless steels in a variety of environments [5][6][7][8][9][10]. The mechanism of the beneficial effect of added Cu is attributed widely to the suppression of anodic dissolution by elemental copper deposition on the steel surface immersed in a corrosive medium [7][8][9][10].…”

Effect of surface passivation on corrosion resistance and antibacterial properties of Cu-bearing 316L stainless steel

“…This was related to the bi-layer structure of passive film, where the outer layer was enriched in iron oxide and the inner layer was enriched in chromium oxide[38]. Lin et al observed the similar phenomenon for Cu-bearing SS (Fe-18Cr-8Ni-xCu) passivated in sulfuric acid solution[39]. In general, Cr enrichment in passive film was well known as the process of passivation promoting the redox reaction of Cr on surface of SS[40][41][42].…”

Corrosion behaviour of AISI 304 stainless steel with Cu coatings in H2SO4

“…At the present time, the commercial copper containing austenitic stainless steels derived from 18Cr-8Ni grade contains approximately 2-3 wt.% Cu [22]. This is an advantage in the fabrication process since austenitic stainless steel manufacturers have started to replace iron oxide ores with iron scrap as raw material, which is contaminated with copper.…”