Accumulation of copper layer on a surface in the anodic polarization of stainless steel containing Cu at different temperatures

Electrochemical and Surface Analytical Approach to Passive Film on 200 Series Stainless Steels Formed in Sulfuric Acid

“…Other researchers have reported a similar feature and linked to oxidation of Cu on the electrode surface. 8,9) The appearance of secondary anodic peak in ferritic stainless steels containing Cu in sulphuric acid has been reported by Seo et al 8) Anodic dissolution of metallic Cu (Cu→ Cu ϩ2 ϩ2e) from stainless steel was attributed to the secondary anodic peak. In another study, Hermas et al 9) have observed the secondary anodic peak in AISI 304 SS containing 0.5 to 2 % Cu.…”

“…8,9) The appearance of secondary anodic peak in ferritic stainless steels containing Cu in sulphuric acid has been reported by Seo et al 8) Anodic dissolution of metallic Cu (Cu→ Cu ϩ2 ϩ2e) from stainless steel was attributed to the secondary anodic peak. In another study, Hermas et al 9) have observed the secondary anodic peak in AISI 304 SS containing 0.5 to 2 % Cu. Their study however shows that the magnitude of anodic peak remains the same, irrespective of Cu content but depends on the amount of Cu accumulated on the surface during active dissolution.…”

The Mechanism of Corrosion of Steel 304L in the Presence of Copper in Industrial Installations / Mechanizm Korozji Stali Austenitycznej 304L W Obecności Miedzi W Instalacjach Przemysłowych

“…As a result, corrosion pits with a very well developed characteristic surface form. There have been reports about the (disputable) influence of alloying austenitic steel with copper on the corrosion resistance of the former [10,11,12]. It has been found that during the corrosion of austenitic steel the ions passing into the corrosive solution can intensify the corrosion process.…”

“…6) and the microscopic scale ( Figs 7-10). Copper deposition on the surface of austenitic steel was also observed in [10,11,14]. Corroding copper sends its ions to the solution, which travel towards the steel surface and deposit on it as metallic copper.…”

“…Corroding copper sends its ions to the solution, which travel towards the steel surface and deposit on it as metallic copper. Numerous studies have shown that the copper ions in the corrosive solution can also come from the solubilisation of austenitic steel containing copper in its chemical composition [10,11,14]. The microscopic examinations showed that copper deposition occurred mainly on the surface damaged by corrosion around the sensitized points where the process of anodic solubilisation had begun in the corrosion-affected places, i.e.…”