The corrosion inhibition of carbon steel in lithium bromide solution by hydroxide and molybdate at moderate temperatures

Tanno, Kazuo; Itoh, Masahiko; Sekiya, Hiromi; Yashiro, Hitoshi; Kumagai, Naoya

doi:10.1016/0010-938x(93)90240-h

Cited by 43 publications

(25 citation statements)

References 4 publications

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“…As a result, the IE R increases with increase in immersion time. The larger values of impedance and the character of the impedance diagrams suggest the existence of a passive film in PAA in the presence of Na 2 MoO 4 [33]. The decrease in C dl suggests that the film becomes thicker and more protective with increasing immersion time [32].…”

Section: Effect Of Immersion Timementioning

confidence: 88%

Effect of sodium molybdate on the corrosion behavior of cold rolled steel in peracetic acid solution

Jiang

et al. 2008

J Appl Electrochem

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The effect of sodium molybdate (Na 2 MoO 4 ) on the corrosion of cold rolled steel (CRS) in peracetic acid (PAA) solution was investigated by gravimetric measurements, Tafel polarization curves, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS). All the data indicate that Na 2 MoO 4 acts as a very good inhibitor in PAA solution. The inhibition efficiency increases with increasing concentration of Na 2 MoO 4 and immersion time. The inhibition efficiencies, calculated from gravimetric measurements, Tafel polarization curves and electrochemical impedance spectroscopy, are in reasonably good agreement and are very similar in the three cases. Furthermore, polarization data show that Na 2 MoO 4 behaves as an anodic passive type inhibitor. Fourier transform infrared spectroscopy (FTIR) and atomic force microscopy (AFM) were used to characterize the corrosion surface. A probable mechanism is presented to explain the experimental results.

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Section: Effect Of Immersion Timementioning

confidence: 88%

Effect of sodium molybdate on the corrosion behavior of cold rolled steel in peracetic acid solution

Jiang

et al. 2008

J Appl Electrochem

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“…The metals and working fl uid adopted in refrigerators should be capable of resisting corrosion because the modern refrigerator tends to be at high temperature and miniaturized. Previous research [2] indicated that using both OH -and MoO 4 2-as inhibitors in lithium bromide solution could prevent the corrosion of carbon steel effectively. However, studies on low alloy steel are rarely reported.…”

Section: Introductionmentioning

confidence: 99%

“…Lithium bromide is a highly corrosive substance which attacks copper [1] and most ferrous metals in carbon steel [2] , low alloy steel [3] and stainless steel [4] . Not only the corrosion process affects the lifespan of refrigerators, but also the evolving hydrogen unbalances the pressure difference between the high pressure and low pressure compartments.…”

Section: Introductionmentioning

confidence: 99%

Effects of Mo composites on the corrosion behaviors of low alloy steel

Liang

Guo

2007

J. Wuhan Univ. Technol.

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By using electrochemical and weight loss methods, the effect of MoO 4 2-on the corrosion behaviors of low alloy steel was investigated in the 55%LiBr+0.07 mol/L LiOH solution at high temperature. The results show that MoO 4 2-, being an anodic inhibitor, would form a passive fi lm rapidly and impede both anodic and cathodic reactions. Moreover, Na 2 MoO 4 effectively prevents corrosion in 55%LiBr+0.07 mol/L LiOH solution when its concentration is higher than 200 mg/L. Some elements of alloy, such as chromium and nickel, may cause the widening of passive potential region and the decrease of passive density, which indicates that the corrosion resistance increases. AES analysis shows that molybdenum participates in forming a protection fi lm. The synergistic effect between chromium and molybdenum induces Cr-steel to be in passive state in lower Na 2 MoO 4 concentration.

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“…Although some literature can already be found reporting results obtained with each of these elements [1][2][3], application of molybdate has been more investigated [2][3][4][5][6][7][8][9][10][11][12]. Mo is well known as a localized corrosion inhibitor when present in electrolyte as Mo (VI) [13][14][15][16][17] or as an alloying element in steel. Molybdate treatments have been applied also for decorative and solar absorption functional purposes [18,19].…”

Section: Introductionmentioning

confidence: 99%