Corrosion inhibition effects of metal cations on SUS304 in 0.5 M Cl− aqueous solution

Abstract

The corrosion characteristics of SUS304 exposed to 0.5 M Claqueous solution containing 14 different metal cations were studied with immersion tests, surface analysis and 15 electrochemical tests. The mechanism of corrosion with metal cations was clarified by the 16 XPS analysis results together with the hard and soft acid and base (HSAB) concept and the 17 passive films structure. It is supposed that metal cations with large hardness make a layer by 18 chemical bonding with the passive films. The passive films are protected by the metal cation 19 layer from Clattack, and consequently corrosion reactions are inhibited.

Dehalococcoides mccartyi strain NIT01 grows more stably in vessels made of pure titanium rather than the stainless alloy SUS304

“…In contrast, stainless alloys have shown no antibacterial activity in previous studies; they showed no inhibition of Escherichia coli growth (Jin et al, 2015; Wang et al, 2013) and resulted in less biofilm formation but a higher suspended cell density of Legionella (Rogers et al, 1994) compared with that of plastics, and there were no differences in biofilm formation in drinking water between stainless alloys and plastic surfaces (Zacheus et al, 2000). On the other hand, stainless alloys are known to be degraded by acid and high temperatures (Islam et al, 2018) and corroded under high salt (Islam et al, 2018) or reducing conditions (Islam et al, 2018). Corrosion is also sometimes facilitated in the presence of biomolecules, such as proteins (Hedberg et al, 2013) or microorganisms (Jin et al, 2019).…”

“…In the culture with SUS 304 or SUS 316, the Ni 2+ concentration was likely <100 μM because the highest eluted iron concentration in SUS304 and SUS316 in this study was 276 μM, and the relative abundance of Ni is 8%–14% for the stainless alloy. However, the elution of metal ions from the stainless alloys was reported to vary depending on the alloy, ion conductivity, temperature, and redox conditions (Hedberg et al, 2013; Islam et al, 2018). The D. mccartyi strain NIT01 was most sensitive to Cr 3+ , but the dechlorination activity varied among the three cultures.…”

Hydrogen Permeation Behavior of Scratch on Zn Coated Steel during 1000 Hours Wet and Dry Corrosion Test

“…Islam et al reported that Zn 2 + in the solution easily forms thin Zn protective layer on the steel surface after immersion test. 16,17) It is seemed that a thin Zn protective layer existed on the scratch. AES surface analysis which can measure the thin surface layer was carried out.…”

Hydrogen Permeation Behavior of Scratch Formed on Zn Coated Steels in Simulated Atmospheric Corrosion Environment

“…Islam et al reported that Zn formed thin protective layer on steel surface after immersion test. 25,26) This thin Zn protective layer may inhibit corrosion reaction and hydrogen entry. Igarashi et al reported that hydrogen permeation current after laser irradiation in the aqueous solution containing Zn 2 + was smaller than that in the solution containing Na + or Mg + .…”