Pitting Corrosion of Titanium

Cotton, J.B.

doi:10.1179/000705972798323297

Cited by 15 publications

(4 citation statements)

References 4 publications

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“…A cyclic polarization technique will help in calculating the crevice and pitting corrosion resistance of Ti-6Al-4V 139 in different environments (marine, industrial and chemical) and at temperatures ranging from 25 °C to 500 °C. As a final point, SEM was accustomed to understanding the ruin of the alloy under different environmental conditions.…”

Section: He Of Metalsmentioning

confidence: 99%

A critical appraisal of laser peening and its impact on hydrogen embrittlement of titanium alloys

Rajyalakshmi

Swaroop

2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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Many efforts have been made to understand the effects of hydrogen on titanium alloys, resulting in an abundance of theoretical models and papers. Titanium alloys are crucial advanced materials that provide an excellent combination of a high strength-to-weight ratio and good corrosion behaviour even though they are reasonable to corrosion attack. Titanium alloys are susceptible to hydrogen embrittlement when comes into contact with hydrogen, and galvanic pair with an active metal current, or the pH is greater than 12 or less than 3 or an impressed current. In view of the fact that hydrogen behaves differently with α and β phases, hydrogen degradation may vary markedly in titanium alloys. Hydrogen diminishes the corrosion and erosion resistance and fatigue life of in-service titanium components. A laser peening or laser shock peening is a novel technique for making the metal surfaces and sub-layers densify. It evokes that laser shock peening adoption results in yielding and plastic deformation, thereby creating high compressive residual stresses extending below the surface of the material which is desirable for hydrogen embrittlement resistance and reduction of crack initiation and growth of the component. This article is a review of information relating hydrogen embrittlement of titanium alloys and surface modification technique which influence the strength potential of titanium alloys.

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Section: He Of Metalsmentioning

confidence: 99%

A critical appraisal of laser peening and its impact on hydrogen embrittlement of titanium alloys

Rajyalakshmi

Swaroop

2019

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…Titanium and titanium alloys have been used in corrosive environments, such as seawater and hazardous gases, due to their excellent corrosion resistance [ 1 , 2 , 3 , 4 ]. However, pure titanium would suffer from corrosion when exposed to a high-temperature chloride solution and non-oxidizing acid solutions with low pH [ 5 , 6 , 7 , 8 ]. Titanium cathode has commonly been utilized in producing copper foil for lithium ion batteries with a form of drum, where highly concentrated sulfuric acid is used as an electrolyte, indicating that corrosion would be an issue.…”

Section: Introductionmentioning

confidence: 99%

Effect of Iron Content on Corrosion Properties of Pure Titanium as Grain Refiner

Seo¹,

Im²,

Park³

et al. 2021

Materials

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Microstructures and corrosion properties of pure titanium were characterized when iron was used as a grain refiner. The added Fe element acted as a strong grain refiner for pure titanium by forming β Ti phase at grain boundaries, and 0.15 wt% Fe was revealed to be a sufficient amount to make the grain size of pure titanium below 20 μm, which was the requirement for the desired titanium cathode. However, corrosion resistance was decreased with the Fe amount added. From the open circuit potential (OCP) results, it was obvious that the TiO2 stability against the reducing acid environment was deteriorated with the Fe amount, which seemed to be the main reason for the decreased corrosion resistance. Electrochemical impedance spectroscopy (EIS) results showed that both the decrease in the compact oxide film’s resistance (Rb) and the appearance of the outer porous film occurred as a result of the dissolution of the TiO2 layer, whose phenomena became more apparent as more Fe was added.

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“…10 Since Ti is commonly used in very aggressive environments containing high Cl − concentration at high temperature, the pitting corrosion of Ti is a major concern for industry and engineers. 4,12,13 Halide solutions are noted for their ability to induce pitting on metals. 10,11 For many other metals and alloys, a large amount of research has been carried out on pitting corrosion in Cl − containing solutions.…”

mentioning

confidence: 99%

“…11,15,[24][25][26] These inhibition effects have also been explained in terms of various theories. 10,13,[21][22][23] Connor et al and Anderson and Hocking suggested that CrO 4 2− and HPO 4 2− ions competed with Cl − ions for adsorption sites on aluminum oxide. 24,25 Pistorius and Burstein reported that the inhibition effect of SO 4 2− on the pitting of stainless steels was due to its ability to lower the solubility of the metal cation in the pit anolyte.…”

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confidence: 99%

Effects of Temperature and Sulfate on the Pitting Corrosion of Titanium in High-Temperature Chloride Solutions

Liu

Alfantazi

Asselin

2015

J. Electrochem. Soc.

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The effects of temperature (100-230 • C) and sulfate concentration (0-0.5 mol L −1 ) on the pitting corrosion of titanium were studied in de-aerated 1 mol L −1 NaCl solution using cyclic potentiodynamic polarization (CPP) and linear-sweep thermammetry measurements. With increasing temperature, the breakdown potential E b of titanium decreased, while the repassivation potential E rp of titanium remained constant in 1 mol L −1 NaCl solution. The presence of sulfate ions shifted both the E b and E rp to higher values, implying that the pitting of titanium was inhibited. In 1 mol L −1 NaCl solution with 0.5 mol L −1 sulfate addition, titanium did not undergo passivity breakdown at 200 • C, even up to 9 V vs. SHE. X-ray photoelectron spectroscopy results showed that the inhibition effect of sulfate on the pitting could be attributed to the competition for adsorption sites on the oxide surface. A metastable pitting temperature threshold (MPTT) was defined for titanium as a function of sulfate to chloride mole ratio using linear-sweep thermammetry measurements. The MPTT results were consistent with those obtained in CPP measurements. The results confirmed that the MPTT of titanium was elevated by the addition of sulfate ions.

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Pitting Corrosion of Titanium

Cited by 15 publications

References 4 publications

A critical appraisal of laser peening and its impact on hydrogen embrittlement of titanium alloys

A critical appraisal of laser peening and its impact on hydrogen embrittlement of titanium alloys

Effect of Iron Content on Corrosion Properties of Pure Titanium as Grain Refiner

Effects of Temperature and Sulfate on the Pitting Corrosion of Titanium in High-Temperature Chloride Solutions

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