Untitled

Robin, A.; Rosa, Jorge Luiz; Sandim, Hugo Ricardo Zschommler

doi:10.1023/a:1017584120460

Cited by 24 publications

(16 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These both factors are known to affect the corrosion behavior of metallic materials [5]. Nevertheless, the values of OCP obtained for titanium in the active state (in the present work in 80 wt% sulfuric acid solutions) are close to the values reported by Rauscher [19] and Robin [20]. The corrosion current densities of titanium, tantalum and their alloys, determined from the cathodic polarization curves using the extrapolation method, are presented in Fig.…”

Section: Resultssupporting

confidence: 87%

“…The discrepancy between these results and those obtained in this work may be related to the aeration of the sulfuric acid solutions and the oxygen content of titanium. Indeed, Rauscher [19] used deaerated sulfuric acid solutions, thus more reducing solutions, and Robin [20], lower oxygen content titanium (< 400 ppm). These both factors are known to affect the corrosion behavior of metallic materials [5].…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Electrochemical behavior of titanium‐tantalum alloys in sulfuric acid solutions

Souza¹,

Robin²

2004

Materials & Corrosion

Self Cite

View full text Add to dashboard Cite

Titanium exhibits a good corrosion resistance in oxidizing acids and neutral media but it is severely attacked in reducing acids. On the contrary, tantalum presents an excellent resistance in both oxidizing and reducing acids, but its high cost limits its use to very aggressive conditions. The titanium-tantalum alloys are promising materials for use in reducing acids, due to their lower cost and density when compared to tantalum, and their higher corrosion resistance when compared to titanium. Titanium-20, 40, 60 and 80 wt% tantalum alloys were prepared by arc-melting and their microstructures were characterized by scanning electron microscopy and Xray diffractometry. Their electrochemical behaviors were studied in 20 to 80 wt% sulfuric acid solutions at room temperature, using open-circuit potential measurements, potentiodynamic polarization and electrochemical impedance spectroscopy. Different behaviors were observed depending on the tantalum content and acid concentration. A clear tendency of increase in corrosion resistance with the increase of tantalum content is observed, especially in 80 wt% sulfuric acid solutions.

show abstract

Section: Resultssupporting

confidence: 87%

Section: Resultsmentioning

confidence: 99%

Electrochemical behavior of titanium‐tantalum alloys in sulfuric acid solutions

Souza¹,

Robin²

2004

Materials & Corrosion

Self Cite

View full text Add to dashboard Cite

show abstract

“…The electrode surface was examined by SEM before and after immersion in the test solution. Details of the experimental procedures were as described elsewhere [4]. Materials and Corrosion 2004, 55, No.…”

Section: Methodsmentioning

confidence: 99%

Corrosion inhibition of Ti‐6Al‐4V alloy in sulfuric and hydrochloric acid solutions using inorganic passivators

Mogoda

Ahmad

Badawy³

2004

Materials & Corrosion

View full text Add to dashboard Cite

The effect of iodate (IO 3 À ), metavanadata (VO 3 À ) and molybdate (MoO 4 2À ) anions on the passivation of Ti-6Al-4V alloy in sulfuric and hydrochloric acid solutions was studied using open-circuit potential measurements, polarization techniques and electrochemical impedance spectroscopy (EIS). The alloy surface was examined by scanning electron microscopy (SEM). It was found that an optimum concentration of the passivator is essential for the corrosion inhibition process. Above this concentration the rate of alloy corrosion decreases as the concentration of the passivating ion increases.Scanning electron micrographs have shown that the flawed regions present in the alloy surface were repaired in the presence of the passivator anion. The optimum concentration of each anion and its corrosion inhibition efficiency for titanium and Ti-6Al-4V alloy have been determined. It turned out that the corrosion inhibition efficiencies of IO 3 À , VO 3 À and MoO 4 2À anions for the corrosion of Ti and Ti-6Al-4V in both hydrochloric and sulphuric acid solutions exceed 98%.

show abstract

“…as alternate to austenitic SS for use in nitric acid application [1,[7][8][9]. The corrosion resistance of titanium is attributed to the formation of protective and strongly self-adherent oxide film, mainly composed of TiO 2 and suboxides (Ti 2 O 3 ) at the metal surface [1,7,10,13]. Titanium is known to offer outstanding corrosion resistance in wide variety of environments, especially in oxidizing, neutral, inhibited reducing media [9][10][11][12][13] and at concentrations and temperatures where SS undergoes severe uniform and IGC attack [3,11,13,14].…”

Section: Introductionmentioning

confidence: 99%

“…The corrosion resistance of titanium is attributed to the formation of protective and strongly self-adherent oxide film, mainly composed of TiO 2 and suboxides (Ti 2 O 3 ) at the metal surface [1,7,10,13]. Titanium is known to offer outstanding corrosion resistance in wide variety of environments, especially in oxidizing, neutral, inhibited reducing media [9][10][11][12][13] and at concentrations and temperatures where SS undergoes severe uniform and IGC attack [3,11,13,14]. For this reason, titanium is widely used for handling nitric acid in industrial applications over wide range of conditions as heat exchangers, valves, storage tanks, thermometric devices and marine environments [1,8].…”

Section: Introductionmentioning

confidence: 99%