The Pitting Corrosion Resistance of Microcrystalline Coatings of Sputtered 321 Stainless Steel

Liu, D.; Wang, F.; Cao, Chenzhong; Lou, Huiling; Zhang, L.; Lin, Hong

doi:10.5006/1.3585054

Cited by 19 publications

(9 citation statements)

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“…Nonetheless, for single phase structured sputtered thin films, it has been shown that the transition from austentic to ferritic structure does not influence the corrosion resistance remarkably. 15,16 The EPMA results presented in Fig. 5 indicate uniform distributions of the main elements (Fe, Cr and Ni) on both the CC 304ss and NC thin film.…”

Section: Resultsmentioning

confidence: 89%

The Electrochemical Corrosion Behavior of Nanocrystalline 304 Stainless Steel Prepared by Magnetron Sputtering

Pan

Liu

et al. 2012

J. Electrochem. Soc.

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The electrochemical corrosion behavior of magnetron sputtered nanocrystalline (NC) 304 stainless steel (ss) thin film as well as that of the conventional rolled coarse crystalline (CC) 304ss has been studied in 0.05 M H 2 SO 4 + 0.2 M NaCl solution using electrochemical and imaging techniques. The experimental results indicate that the NC thin film exhibits superior corrosion resistance compared to CC 304ss. The semi-conductor properties of the passive films on both materials as predicted by the Mott-Schottky equation show that the donor and acceptor concentrations of the passive film on NC thin film are higher than that of CC 304ss, while diffusion coefficients of carriers are lower than for CC 304ss. The composition of the passive film on NC thin film measured by X-ray photoelectron spectroscopy (XPS) has a higher the ratio of Cr oxides to Fe oxides. In-situ AFM observation found that the growth rate of the passive film on NC thin film was significantly faster than that of CC 304ss. The higher content of Cr oxides and better passivation ability of the passive film enhance the corrosion resistance of the nanocrystalline specimen together.The 304 grade of stainless steels are widely used in many fields for their exceptional corrosion resistance. Unfortunately, their resistance to pitting corrosion in solutions containing Cl − is not good enough and remains a cause for concern. Recent advances in surface science and technology have enhanced the ability to process and investigate materials at the nano-scale, hence facilitating better understanding of fundamental physicochemical properties that could provide vital insights into the mechanisms of metal corrosion and protection, particularly since variations in particle size and metal microstructure determine the rate of diffusion of both the corrodent and film-forming corrosion products through the lattice. Some investigations have actually shown that nanocrystallization can significantly improve corrosion resistance of stainless steel. [1][2][3] Among the several techniques for nanocrystallization, the magnetron sputtering technique has attracted considerable attention because nanocrystalline thin films prepared via this technique are homogeneous and have the same chemical composition as the target substrate. 4 It has also been reported that nanocrystalline thin films produced by the magnetron sputtering technique possess superior anticorrosion abilities compared to the conventional polycrystalline alloy. 5-7 Such magnetron sputtered specimens find useful applications under high-temperature conditions 8-10 as well as in liquid systems. 11,12 It has previously been reported that nanocrystallization modified the growth mechanism of the passive film on the CC 304ss, which involved changing the nucleation mechanism from progressive to instantaneous, thereby increasing the film growth rate. 13 These effects altered the growth structure, and hence influenced the characteristics of the passive film and ultimately the corrosion behavior of the material. However, there is as...

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Section: Resultsmentioning

confidence: 89%

The Electrochemical Corrosion Behavior of Nanocrystalline 304 Stainless Steel Prepared by Magnetron Sputtering

Pan

Liu

et al. 2012

J. Electrochem. Soc.

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“…Such coatings have been found to show superior corrosion resistance compared with that of conventional polycrystalline alloys [1][2][3]. This has been attributed to the fact that in the sputtered coatings there are far fewer dislocations, imperfections and second phase particles [4].…”

Section: Introductionmentioning

confidence: 95%

Effects of nanocrystallization on the corrosion behavior of 309 stainless steel

Liu

Wang

2006

Electrochimica Acta

127

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“…Grain refinement has great influence on the mechanical strength and corrosion behaviour of SS [6,[22][23][24][25]. Initial investigations have shown that grain refinement can improve both the corrosion and mechanical properties; however, grain refinement was limited to a few microns [6,[21][22][23][24][25][26][27][28][29][30][31][32].…”

Section: Introductionmentioning

confidence: 99%

The influence of nanocrystalline structure and processing route on corrosion of stainless steel: A review

2015

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The Pitting Corrosion Resistance of Microcrystalline Coatings of Sputtered 321 Stainless Steel

Cited by 19 publications

References 0 publications

The Electrochemical Corrosion Behavior of Nanocrystalline 304 Stainless Steel Prepared by Magnetron Sputtering

The Electrochemical Corrosion Behavior of Nanocrystalline 304 Stainless Steel Prepared by Magnetron Sputtering

Effects of nanocrystallization on the corrosion behavior of 309 stainless steel

The influence of nanocrystalline structure and processing route on corrosion of stainless steel: A review

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