Characterisation of three-dimensional porosity in an Fe-based amorphous coating and its correlation with corrosion behaviour

Zhang, S.D.; Zhang, W.L.; Wang, S.G.; Gu, Xiaojun; Wang, J.Q.

doi:10.1016/j.corsci.2015.01.022

Cited by 140 publications

(57 citation statements)

References 64 publications

(108 reference statements)

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“…However, when the porosity is lower than 1.22%, the corrosion resistance seems more sensitive to the amorphous phase content. If the thickness of the coating decreases, the number of through-porosity in coating increases, which affects the corrosion resistance, as shown in Figure 10 [77]. It indicates that throughporosity is much more detrimental to the corrosion resistance of the coated material compared with nonthrough porosity.…”

Section: Effects Of Microstructure Homogeneitymentioning

confidence: 84%

“…The effect of porosity on the corrosion resistance is investigated in some literatures [75][76][77].The corrosion resistance of coating 1 with the porosity of 0.04% is better than that of another two coatings with the porosity of 0.2% and 0.5%, respectively [75]. When the porosity decreases form 1.89% of low deposition rate to 1.22% of high deposition rate, the corrosion resistance of FeCrMoCBY amorphous coating increases evidently due to the elimination of through pores [76].…”

Section: Effects Of Microstructure Homogeneitymentioning

confidence: 99%

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Corrosion Resistance and Electrocatalytic Properties of Metallic Glasses

Wang¹

2016

Metallic Glasses - Formation and Properties

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Metallic glasses exhibit excellent corrosion resistance and electrocatalytic properties, and present extensive potential applications as anticorrosion, antiwearing, and catalysis materials in many industries. The effects of minor alloying element, microstructure, and service environment on the corrosion resistance, pitting corrosion, and electrocatalytic efficiency of metallic glasses are reviewed. Some scarcities in corrosion behaviors, pitting mechanism, and eletrocatalytic reactive activity for hydrogen are discussed. It is hoped that the overview is beneficial for some researcher paying attention to metallic glasses.

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Section: Effects Of Microstructure Homogeneitymentioning

confidence: 84%

Section: Effects Of Microstructure Homogeneitymentioning

confidence: 99%

Corrosion Resistance and Electrocatalytic Properties of Metallic Glasses

Wang¹

2016

Metallic Glasses - Formation and Properties

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“…Many researches have already proved that coating thickness directly affects the corrosion resistance property of the coating . Yin et al prepared ceramic coatings with different thickness on stainless steel substrate by plasma spraying and found that with the increase in coating thickness, the porosity of the coating increased and the hardness and corrosion resistance of the coating decreased.…”

Section: Introductionmentioning

confidence: 99%

The long‐term effectiveness and failure mechanism of the chemically bonded phosphate ceramic coatings with different thickness

Liu

Bian

2019

Int J Applied Ceramic Tech

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In this study, the chemically bonded phosphate ceramic coatings (CBPCs) with different thickness (100 µm, 200 µm, and 300 µm) are prepared on the mild steel (Q235). Potentiodynamic polarization testing and electrochemical impedance spectroscopywere carried out to study the synthetic effect of coating thickness and etching time (12,24,36, and 48 hours) on the corrosion behavior of CBPCs. The surface and cross section microstructure of CBPCs before and after different immersion time in 3.5 wt.% NaCl solution is investigated to better understand the corrosion behavior.Results revealed that the enhanced coating thickness can effectively postpone the corrosive factors infiltration into the substrate and prohibit the corrosion of the mild steel. From the potentiodynamic polarization testing results, the protection efficiency of the coating greatly increases with the increase in etching time. In addition, an increase in 10 000 and 1000 orders of magnitude of impedance value for the CBPCs with 12 hours and 48 hours etching time has been observed, respectively, indicating the CBPCs can effectively protect the mild steel from corrosion damage even with long-term service. K E Y W O R D Schemically bonded phosphate ceramic coatings, coating thickness, corrosion performance, etching time, mild steel

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“…They can be successfully coated on steel substrate by thermal spray technology [10][11][12][13][14], where the amorphous structure is retained due to sufficiently rapid cooling that prevents long-range diffusion and crystallization. These advantages have demonstrated an enhanced comprehensive performance on steel surfaces in industrial applications, such as a better corrosion resistance than electroplated Cr and stainless steel in NaCl solution [15,16].Many scholars have researched the corrosion behavior of amorphous coatings [17][18][19][20][21][22][23][24][25][26]. For example, M.S.…”

mentioning

confidence: 99%

“…Many scholars have researched the corrosion behavior of amorphous coatings [17][18][19][20][21][22][23][24][25][26]. For example, M.S.…”

mentioning

confidence: 99%

Electrochemical Corrosive Behaviors of Fe-Based Amorphous/Nanocrystalline Coating on Stainless Steel Prepared by HVOF-Sprayed

et al. 2019

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In this study, FeCrMnWMoSi amorphous/nanocrystalline coating was prepared on stainless steel by high-velocity oxygen fuel (HVOF) spraying. In order to thoroughly evaluate this novel material, the corrosion behaviors and corrosive film characteristics of the amorphous/nanocrystalline coating in NaCl corrosive media were studied using electrochemical measurement technologies such as potentiodynamic polarization curves and electrochemical impedance spectroscopy (EIS). It was found that the corrosion resistance of Fe-based amorphous/nanocrystalline coating could be attributed to the passive film formed, which consisted of Fe, Cr, Mo, and W oxides. pH has an important influence on the corrosion resistance of amorphous/nanocrystalline coating by changing the pitting corrosion mechanism. Under neutral and acidic conditions, the corrosion mechanism of Fe-based amorphous/nanocrystalline coating was mainly local pitting corrosion. However, under strong alkaline conditions, the amorphous/nanocrystalline coating not only had pitting corrosion, but also had the active dissolution of the passive film. Therefore, the anti-corrosion performance of Fe-based amorphous/nanocrystalline coating under alkaline conditions was not as good as neutral and acidic corrosive medium.Compared with crystalline alloys and stainless steels of the same composition, amorphous alloys have excellent wear and corrosion resistance, so they are ideal coating materials for applications in marine and industrial fields [3,4]. For example, in the power industry, boiler pipes, steam turbine rotating shafts, blades, valve elbows, and other key components are subject to severe wear, corrosion, or erosion, which poses safety hazards to the long-term operation of power station equipment [5]. The application of amorphous coatings to protect the surface of these components is an effective technical method to solve those problems. Amorphous coatings also have huge application prospects for protection of steel facilities (such as television towers, bridges, road facilities, floodgates, microwave towers, high-voltage transmission towers, underground cable supports, and even transportation and underground storage of nuclear waste) from long-term exposure to harsh outdoor environments [6]. Among those amorphous alloy materials, Fe-based amorphous alloys are the most attractive due to their unique properties including high hardness, superior corrosion and wear resistance, and relatively low cost [7][8][9]. They can be successfully coated on steel substrate by thermal spray technology [10][11][12][13][14], where the amorphous structure is retained due to sufficiently rapid cooling that prevents long-range diffusion and crystallization. These advantages have demonstrated an enhanced comprehensive performance on steel surfaces in industrial applications, such as a better corrosion resistance than electroplated Cr and stainless steel in NaCl solution [15,16].Many scholars have researched the corrosion behavior of amorphous coatings [17][18][19][20][21][22][23][24][25][26]. ...

show abstract

Characterisation of three-dimensional porosity in an Fe-based amorphous coating and its correlation with corrosion behaviour

Cited by 140 publications

References 64 publications

Corrosion Resistance and Electrocatalytic Properties of Metallic Glasses

Corrosion Resistance and Electrocatalytic Properties of Metallic Glasses

The long‐term effectiveness and failure mechanism of the chemically bonded phosphate ceramic coatings with different thickness

Electrochemical Corrosive Behaviors of Fe-Based Amorphous/Nanocrystalline Coating on Stainless Steel Prepared by HVOF-Sprayed

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