Research on Zn-Al15 thermal spray metal coating and its organic painting composite system protection performance

Xiao, Yao; Jiang, Xinhua; Yi-de, Xiao; Ma, Liangli

doi:10.1016/j.proeng.2011.12.632

Cited by 29 publications

(10 citation statements)

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“…Al, Zn, and Al-Zn thermal spray wires are mainly used for thermal spray coating materials. In particular, Zn-Al thermal spray coatings with the flame and arc spraying methods have been widely used for the longterm corrosion protection of the structural steel due to synergy effect of the great galvanic protection of Zn and the satisfactory erosion resistance of Al [5,6]. However, in this paper, Al-Mg thermal spray coating is applied to SS400 steel for the enhancement of the erosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Characteristics in Seawater for Cold Thermal Spray-Coated Al–Mg Alloy Layer

Park

Kim

2016

Acta Metall. Sin. (Engl. Lett.)

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For corrosion protection of carbon steel in a marine environment, cold arc thermal spray coating was applied to the surface with Al and Al-Mg alloy wires. The surface hardness of Al and Al-Mg thermal spray coatings increased with Mg content. And the various electrochemical experiments were carried out to evaluate corrosion damage characteristics of the thermal spray coating layers. The Al and Al-Mg thermal spray coating layers presented negative potentials compared to carbon steel in corrosion potential measurements. And an anodic polarization experiment revealed a tendency of activation polarization with no passivation. Furthermore, the corrosion damage of the thermal spray coating layer in galvanostatic experiment was observed mainly at the defect area, and the Al-3Mg thermal spray coating layer presented less surface damages than others. In addition, the Al-3Mg thermal spray coating layer showed the lowest corrosion rate while having a sufficient driving voltage for cathodic corrosion protection. Therefore, it is an optimal thermal spray material for sacrificial anode.

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Section: Introductionmentioning

confidence: 99%

Electrochemical Characteristics in Seawater for Cold Thermal Spray-Coated Al–Mg Alloy Layer

Park

Kim

2016

Acta Metall. Sin. (Engl. Lett.)

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“…Furthermore, sacrificial anode metals, such as tin (Sn), magnesium (Mg) and indium (In), which have a better quality of corrosion resistance than zinc (Zn) or aluminum (Al), have been under extensive research study [ 18 ]. However, it seems that there are very few works that quantitatively evaluate the electrochemical performance of ATMSM using these metals [ 19 , 20 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on the Electrochemical Anti-Corrosion Properties of Steel Structures Applying the Arc Thermal Metal Spraying Method

2014

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The arc thermal metal spraying method (ATMSM) provides proven long-term protective coating systems using zinc, aluminum and their alloys for steel work in a marine environment. This paper focuses on studying experimentally the anti-corrosion criteria of ATMSM on steel specimens. The effects of the types of spraying metal and the presence or absence of sealing treatment from the thermal spraying of film on the anti-corrosion performance of TMSM were quantitatively evaluated by electrochemical techniques. The results showed that ATMSM represented a sufficient corrosion resistance with the driving force based on the potential difference of more than approximately 0.60 V between the thermal spraying layer and the base substrate steel. Furthermore, it was found that the sealing treatment of specimens had suppressed the dissolution of metals, increased the corrosion potential, decreased the corrosion current density and increased the polarization resistance. Metal alloy Al–Mg (95%:5%) by mass with epoxy sealing coating led to the most successful anti-corrosion performance in these electrochemical experiments.

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“…There are some known cases of stress corrosion cracking in the welding zone and heat-affected zone of the SS304L body near chlorine-containing environments. Chloride-induced stress corrosion cracking is a crucial issue [10][11][12].Based on cost considerations, the most common method to improve corrosion resistance near shore construction metals is organic coating [13,14]. However, the coatings will degrade when they are exposed to sunlight (UV radiation), humidity, and a chlorine-containing atmosphere.…”

mentioning

confidence: 99%

“…Based on cost considerations, the most common method to improve corrosion resistance near shore construction metals is organic coating [13,14]. However, the coatings will degrade when they are exposed to sunlight (UV radiation), humidity, and a chlorine-containing atmosphere.…”

mentioning

confidence: 99%

Thermal Spray Coatings of Al, ZnAl and Inconel 625 Alloys on SS304L for Anti-Saline Corrosion

et al. 2019

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Stainless steel 304L (SS304L) has been selected as the material for canisters for spent fuel storage from three nuclear power plants in Taiwan. A crucial issue is extending the spent fuel storage safety standards of the canisters. The anti-saline corrosion abilities of three thermal spray coatings (i.e., Al, ZnAl, and 625 Inconel alloys) on the SS304L were evaluated by immersion in 3.5 wt % aqueous NaCl and with 0.025 g/cm2 NaCl deposition at 80 °C and 80% relative humidity (RH) for 1000 h. The pristine thermal spray coatings were examined using the pull-off adhesion test to understand the adhesion strength, and Vickers hardness was measured for the mechanical properties of the three coatings. Confocal laser scanning microscopy (CLSM) was used to identify the porosities of the coatings. Furthermore, the surfaces of the specimens before and after corrosion were investigated using scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy dispersive spectroscopy (EDS). The composition and distribution of the oxide layers formed on the coating surfaces during corrosion were evaluated. Electrochemical measurement was also performed with the polarization method to quantify the corrosion property of the three thermal spray coatings. The results showed that the corrosion rate of Al coating was lowest from the Tafel analysis after the 1000 h corrosion test in 3.5% aqueous NaCl. In contrast, the corrosion rate of Inconel 625 was lowest after 1000 h of the NaCl deposition corrosion test in a controlled environment. Therefore, the ZnAl thermal spray coating is a potential protection layer, keeping in mind economic considerations, of SS304L for anti-corrosion in saline environments.

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Research on Zn-Al15 thermal spray metal coating and its organic painting composite system protection performance

Cited by 29 publications

References 0 publications

Electrochemical Characteristics in Seawater for Cold Thermal Spray-Coated Al–Mg Alloy Layer

Electrochemical Characteristics in Seawater for Cold Thermal Spray-Coated Al–Mg Alloy Layer

Experimental Study on the Electrochemical Anti-Corrosion Properties of Steel Structures Applying the Arc Thermal Metal Spraying Method

Thermal Spray Coatings of Al, ZnAl and Inconel 625 Alloys on SS304L for Anti-Saline Corrosion

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