Effect of ZnO on the corrosion of zinc, Q235 carbon steel and 304 stainless steel under white light illumination

Sun, Mengmeng; Chen, Zhuoyuan; Bu, Yuyu; Yu, Jianqiang; Hou, Baorong

doi:10.1016/j.corsci.2013.12.022

Cited by 98 publications

(45 citation statements)

References 27 publications

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“…It is a model experimental set-up used for the investigations of hydrogen production from water splitting, photocatalysis and fuel cell, through which the variations in current density and potential can be measured simultaneously. A similar arrangement has been used previously [19,20]. This experimental set-up is composed of two separated coupled cells, corrosion cell and photoelectricity cell.…”

Section: Photoelectrochemical/electrochemical Performance Measurementsmentioning

confidence: 99%

The role of the photovoltaic effect of γ-FeOOH and β-FeOOH on the corrosion of 09CuPCrNi weathering steel under visible light

2015

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Section: Photoelectrochemical/electrochemical Performance Measurementsmentioning

confidence: 99%

The role of the photovoltaic effect of γ-FeOOH and β-FeOOH on the corrosion of 09CuPCrNi weathering steel under visible light

2015

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“…It was reported previously that Na 2 S was effective to consume the photo-induced holes in semiconductors. 7,13,21 The holes react with S 2− , and the electrons are excited into the CB, resulting in a more negative CB potential. Since the CB potential is more negative than the corrosion potential of both X52 carbon and 304 stainless steels, the photoelectrons move from the CB to the steels for cathodic protection.…”

Section: Steelsmentioning

confidence: 99%

“…[9][10][11][12] Other photosensitive materials, such as ZnO and Fe 2 O 3 , can also be used as the photoelectrodes. 13,14 However, ZnO suffers from a strong photo-induced dissolution in alkaline solutions. 15,16 The quantum efficiency of Fe 2 O 3 is much lower than that of TiO 2 .…”

mentioning

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Factors Affecting the Performance and Applicability of SrTiO₃Photoelectrodes for Photoinduced Cathodic Protection

Yang

Cheng

2017

J. Electrochem. Soc.

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In this work, various factors affecting the applicability and performance of prepared SrTiO 3 photoelectrodes for photoinduced cathodic protection (CP) were investigated. The capability of the photoelectrode for photoinduced CP depends on the type of steels to be protected. A higher photo current density is required to cathodically protect X52 carbon steel than 304 stainless steel. Threshold areas of the photoelectrode relative to that of the cathode exist for both steels to enable photoinduced CP. The threshold area ratio of the SrTiO 3 photoelectrode to X52 carbon steel is 8: 1 in 3.5 wt% NaCl solution, while, for 304 stainless steel, the area ratio of 1: 1 is sufficient for photoinduced CP. The photoinduced CP performance depends on the hole scavenger used in the photoelectrode cell. Na 2 S is an effective hole scavenger, and both X52 carbon and 304 stainless steels are cathodically polarized by photoelectrons to sufficiently negative values for a full CP. Moreover, the SrTiO 3 photoelectrode can fully protect X52 steel only when the light intensity is up to 125 mW/cm 2 , while a light intensity of 50 mW/cm 2 enables a full CP on 304 stainless steel. The photoinduced CP performance is also subject to the corrosivity of the solutions. Carbon steels are the most commonly used engineering materials due to their good strength-ductility combination, manufacturability and availability. However, the electrochemical activity of carbon steels in aqueous environments make them prone to corrosion. Protective techniques such as coatings, inhibitors and cathodic protection (CP) have been used to prevent steels from corrosion attack.1,2 In particular, the CP mitigates or even stops the corrosion by cathodically polarizing the steels using either an external power supply or sacrificial anodes. It is now mandatory that CP be applied on engineering infrastructure such as buried pipelines and offshore platforms for long-term corrosion protection.2 In remote areas, the unavailability of power supplies limits the application of CP. Recently, novel photoinduced CP systems that use solar energy as the power source to enable the CP have attracted much attention. 3,4 In a photoinduced CP system, a photoelectrode made of photosensitive materials acts as anode and generates photoinduced electronhole pairs under light illumination. In principle, the electrons in the valence band (VB) of an n-type semiconductor are excited into the conduction band (CB) under illumination, while holes are generated in the VB of the semiconductor.5-8 The photoinduced holes participate in anodic reaction on the photoelectrode. Photoelectrons transfer to the metal to be protected for cathodic reaction, resulting in cathodic polarization of the metal. Unlike conventional CP systems, the photoinduced CP uses solar energy as the power source, and the photoelectrode is not consumable. This enables a sustainable, green technology for corrosion prevention of engineering structures.TiO 2 is a typical example material to make photoelectrodes in photoinduced CP syst...

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“…6,14,[23][24][25] Sun et al realized the protection of Q235 and 304 stainless steel in 3.5 wt% NaCl solution by ZnO in solution with added Na 2 S+NaOH solution. 6 Lin et al studied the protection of 403SS in 0.5 M NaCl solution by ZnS/CdS@TiO 2 in Na 2 S+NaOH solution.14 With the hole-scavengers solution, the photocatalytic material shows a good protection performance. But the scavengers will lose efficiency in long-term service, and most importantly they are not useful under practically relevant conditions and cannot be applied in marine environments.…”

mentioning

confidence: 99%

“…What's more, the photocatalytic material itself is not stable: the photogenerated charges composite easily, leading to inhibited photoelectric conversion efficiency, thus auxiliary hole-scavengers solution such as Na 2 S and Na 2 SO 3 have been applied in many published results to improve the electrochemical protection. 6,14,[23][24][25] Sun et al realized the protection of Q235 and 304 stainless steel in 3.5 wt% NaCl solution by ZnO in solution with added Na 2 S+NaOH solution. 6 Lin et al studied the protection of 403SS in 0.5 M NaCl solution by ZnS/CdS@TiO 2 in Na 2 S+NaOH solution.…”

mentioning

confidence: 99%

Long-Term Photoelectrochemical Cathodic Protection by Co(OH)₂-Modified TiO₂on 304 Stainless Steel in Marine Environment

Xie

Liu

Chen

et al. 2018

J. Electrochem. Soc.

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The long-term photoelectrochemical cathodic protection by Co(OH) 2 -surface modified TiO 2 of anatase nanotubes and rutile type, prepared by anodic oxidation has been studied in aqueous 3.5 wt% NaCl solution. Electrochemical measurements have been used to evaluate the photoelectrochemical protective properties of both Co(OH) 2 -modified TiO 2 coupled with 304 stainless steel in 3.5 wt% NaCl solution under illumination and in the dark. Morphologies, crystal structures, surface compositions, and light response range of both Co(OH) 2 -surface modified TiO 2 films before and after immersion were characterized, respectively, by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-Vis spectrophotometry. The results show that the photogenerated electrode potential of both types of TiO 2 films modified with Co(OH) 2 is more negative affording protection of 304 stainless steel than that of the non-modified TiO 2 under illumination. These TiO 2 films provide a long period (12 h) of protection. The anatase-TiO 2 nanotube film always shows a better protection performance than rutile-TiO 2 film. In recent years, photocatalysis has been broadly used in solar cells, for degradation of pollutants, splitting of water, air purification, and corrosion protection of metals.1-3 The latter application has attracted our attention because of its environmental advantages.In 1990s, Tsujikawa and Yuan 4 first proposed the method of photoelectrochemical cathodic protection of metals by photocatalytic materials. They reported the more negative corrosion potential of TiO 2 -coated 304 stainless steel or carbon steel under UV irradiation than that of bare steel. The TiO 2 coating plays the role of providing electrons like a sacrificial anode in cathodic protection. Subsequently, Fujishima et al.5 studied the mechanism of the photoelectrochemical cathodic protection of TiO 2 -WO 3 in 3 wt% NaCl solution with pH = 5. So far, TiO 2 -protection of metals using sunlight has been a focus of great attention as a possible means for converting solar energy to electrical energy by generating the required negative electrode potential. Photoelectrochemical cathodic protection has become an active research field of metal corrosion protection. It has attracted numerous studies and yielded new technologies. [6][7][8][9][10][11][12][13] Many metal oxides and sulfides, such as TiO 2 , 4,9 ZnO, 14 SnO 2 15 and CdS, 16 have been investigated as common photocatalyst materials. TiO 2 is most widely used in current applications because of its high catalytic activity, good resistance to photocorrosion, chemical stability, cheapness, and non-toxicity. 4,[17][18][19] Of the three crystal modifications of TiO 2 , the wide bandgap forms anatase (3.2 eV) and rutile (3.0 eV) are mainly employed in photocatalytic reactions. 20,21 However, photocatalytic materials still have problems in the marine environment. Corrosion is a gradual and long-term destruction of materials. Therefore...

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Effect of ZnO on the corrosion of zinc, Q235 carbon steel and 304 stainless steel under white light illumination

Cited by 98 publications

References 27 publications

The role of the photovoltaic effect of γ-FeOOH and β-FeOOH on the corrosion of 09CuPCrNi weathering steel under visible light

The role of the photovoltaic effect of γ-FeOOH and β-FeOOH on the corrosion of 09CuPCrNi weathering steel under visible light

Factors Affecting the Performance and Applicability of SrTiO₃Photoelectrodes for Photoinduced Cathodic Protection

Long-Term Photoelectrochemical Cathodic Protection by Co(OH)₂-Modified TiO₂on 304 Stainless Steel in Marine Environment

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Effect of ZnO on the corrosion of zinc, Q235 carbon steel and 304 stainless steel under white light illumination

Cited by 98 publications

References 27 publications

The role of the photovoltaic effect of γ-FeOOH and β-FeOOH on the corrosion of 09CuPCrNi weathering steel under visible light

The role of the photovoltaic effect of γ-FeOOH and β-FeOOH on the corrosion of 09CuPCrNi weathering steel under visible light

Factors Affecting the Performance and Applicability of SrTiO3Photoelectrodes for Photoinduced Cathodic Protection

Long-Term Photoelectrochemical Cathodic Protection by Co(OH)2-Modified TiO2on 304 Stainless Steel in Marine Environment

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Product

Resources

About

Factors Affecting the Performance and Applicability of SrTiO₃Photoelectrodes for Photoinduced Cathodic Protection

Long-Term Photoelectrochemical Cathodic Protection by Co(OH)₂-Modified TiO₂on 304 Stainless Steel in Marine Environment