Chemical treatment with cerium to improve the crevice corrosion resistance of austenitic stainless steels

Lu, Yuning; Ives, M. B.

doi:10.1016/0010-938x(94)00126-q

Cited by 79 publications

(28 citation statements)

References 5 publications

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“…As a result of inhibition of electrode processes, cerium improves the localized corrosion resistance. 35 Stoychev studied the corrosion protective ability of electrodeposited ceria layers and proved the occurrence of an effective cathodic process of Ce 4+ reduction into Ce 3+ in the superficial oxide film. 36 In order to further evaluate the corrosion resistance of the ceria coating with a long immersion period (3.5 wt% NaCl solution for 30 days), the corresponding polarization curves for bare and ceria-coated samples are shown in Fig.…”

Section: Effect Of Dip-coating Timementioning

confidence: 99%

Sol–gel route to ceria coatings on AA2024-T3 aluminum alloy

Zuo

et al. 2014

J Coat Technol Res

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The ceria coating was studied as an efficient alternative to the chromate protective coating of aluminum alloys. The environmentally friendly inhibitor of cerium ion was incorporated into the surface coating using Ce(NO 3 ) 3 as precursor via a sol-gel route. The coatings were analyzed with FESEM and EDS. The anticorrosion performance evaluation of the coatings was carried out using electrochemical methods and full immersion experiments. Under the conditions of surface pretreatment with 15 wt% NaOH solution for 20 s, a sol reaction time of 2 h and 3-5 times of dip-coating, the uniform ceria coatings with low defect and barrier were successfully synthesized. After the full immersion process, pitting holes containing copper-rich phases were detected on the surface of the uncoated sample. In contrast, such holes were not observed on the coated sample. Furthermore, the I corr values of the coated samples were smaller than that of the uncoated one, which confirms that the coatings provide a considerable protection barrier and promote the anticorrosion performance of aluminum alloys.

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Section: Effect Of Dip-coating Timementioning

confidence: 99%

Sol–gel route to ceria coatings on AA2024-T3 aluminum alloy

Zuo

et al. 2014

J Coat Technol Res

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“…The rare earth elements (REE) such as Ce have been reported to form a thermodynamically stable surface film composed of CeO x , which improves the resistance to pitting, crevice, and intergranular (stress) corrosions. 1,2) Microalloying of weld metal with Ce has also been shown to significantly improve weldability and oxidation resistance of ASS with grain refinement, decreased dendrite arm spacing and lower hot cracking property due to enhanced oxide scale adherence. [3][4][5] The Ce-bearing ASS has been reported to show excellent antibacterial property compared to conventional Cu-bearing ASS when the amount of Ce added is above a critical value, e.g.…”

Section: Introductionmentioning

confidence: 99%

Influence of Refractory-Steel Interfacial Reaction on the Formation Behavior of Inclusions in Ce-containing Stainless Steel

Kwon

Park

2015

ISIJ Int.

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Effect of Ce addition on the interfacial reaction between alumina refractory and 25wt%Cr-20wt%Ni-4wt%Si-0.5wt%Mn stainless steel deoxidized by Al at 1 873 K was investigated to understand the contribution of the refractory-steel reaction to the inclusion evolution processes. The oxygen content markedly decreased by Al deoxidation, followed by a sluggish decrease by Ce addition greater than 0.5 wt%. The Ce content continuously decreased, but the higher the initial Ce content, the lower the Ce-decreasing rate was obtained. The content of Al initially decreased due to the formation of Al-rich inclusions, followed by an abrupt increase mainly due to a reduction of alumina refractory by Ce at the steel-refractory interface. The content of Al decreased again because of the formation of CeAlO 3 compound not only as inclusions but also as refractory-steel reaction products. The CeAl 11 O 18 and CeAlO 3 were formed at the refractory side, while the Ce 2 O 3 and CeAlO 3 were formed at the steel side in the 0.5 wt% and 1.0 wt% Ce added systems. From the refractory-steel reaction mechanism, the process of inclusion evolution was proposed to three steps as follows. The initial SiO 2 -rich oxides are reduced by Al, resulting in the formation of aluminosilicates inclusions (Step 1). The Al 2 O 3 in the inclusions are reduced by cerium, resulting in the formation of Ce-rich oxides (Step 2). Because the Ce content continuously decreased due to the refractory-steel reaction, the inclusions transform from Ce-Al complex oxides to Al-rich aluminosilicates and from Ce 2 O 3 to Ce-Al complex oxides in the 0.1 wt% and 0.5 wt% Ce added systems (Step 3).

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“…Different authors [10][11][12][13] have studied the effect of immersing aluminum alloys in water solutions of cerium salts on both uniform and pitting corrosion. The kind of cerium salt, the concentration, and the immersion times have been also evaluated.…”

Section: Introductionmentioning

confidence: 99%