Graphene Modified Epoxy Coating Tubing Applied in the Water Injection Wells

Lu, Caihong; Feng, C.R.; Zhu, Lijuan; Jiang, Long; Gao, Guhui; Han, Lihong; Feng, Yaorong

doi:10.1007/978-981-13-0107-0_102

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Based on the analysis of relevant literature reports (Liao et al, 2017;Lu et al, 2018;Wu et al, 2018). If graphene is not added, the coating has relatively porous holes, which cannot well shield the penetration of corrosive media to the coating, so that the coating is greatly affected by corrosion.…”

Section: Analysis Of Coating Corrosion Mechanismmentioning

confidence: 99%

The Corrosion Resistance of Graphene-Modified Oily Epoxy Coating on AZ31 Magnesium Alloys

Gao

Sun

et al. 2021

Front. Mater.

View full text Add to dashboard Cite

In order to enhance the corrosion resistance of AZ31 magnesium alloy, graphene-modified oily epoxy resin coating (G/OEP) were prepared on the surface of magnesium alloy. SEM observations show that graphene has fewer surface defects, and can significantly improve the surface quality of the coating and reduce defects. FI-TR testing shows that coating are mainly composed of epoxy resin (polyurethane) and its corresponding curing agent. Electrochemical testing shows that the coating can provide good corrosion protection for magnesium alloy. Compared with the corrosion current density of magnesium alloy of 6.20 × 10−7 A/cm2, the G/OEP can significantly reduce the corrosion current density to 6.96 × 10−12 A/cm2. Analysis of the morphology of the coating after electrochemical corrosion found that graphene can improve the shielding ability of the coating to corrosive media, and reduce the damage of corrosion to the coating structure, and enhance the corrosion resistance of the coating. The content of graphene for excellent corrosion resistance of coating during this experiment is 0.6 wt%. The graphene can fill the defects generally in the coating during the curing process to prevent substrate from penetration of corrosive media caused by the density and hydrophobicity of coating are increased.

show abstract

Section: Analysis Of Coating Corrosion Mechanismmentioning

confidence: 99%

The Corrosion Resistance of Graphene-Modified Oily Epoxy Coating on AZ31 Magnesium Alloys

Gao

Sun

et al. 2021

Front. Mater.

View full text Add to dashboard Cite

show abstract

Study on Corrosion Resistance of AZ31 Magnesium Alloy Coated with Graphene Modified Epoxy and Polyurethane Coatings

Gao¹

2021

International Journal of Electrochemical Science

View full text Add to dashboard Cite

Graphene-modified epoxy resin coating can impart better corrosion resistance to magnesium alloys. In this regard, the present work focuses on the preparation of graphene-modified oil-based epoxy resin/polyurethane composite coating (G/OEP/OPU) and waterborne epoxy resin/polyurethane composite coating (G/WEP/WPU) and is coated over the AZ31 magnesium alloy to elucidate the corrosion protection behavior. Scanning electron microscopic observation shows that the surface quality of graphene flakes is good. When graphene is added to the oil-based and waterborne epoxy primers, the surface quality of the oil-based polyurethane topcoat is improved, while the surface quality of the waterborne polyurethane topcoat is reduced. Fourier transform infrared spectroscopic testing shows that the coating and the curing agents are the major structural components of the coating. The electrochemical test results show that the composite coatings can significantly improve the corrosion resistance of magnesium alloys. In the oily composite coatings, G/OEP/OPU-0.3wt% shows the highest corrosion resistance where the corrosion current density is 1.81×10 -12 A/cm 2 . For waterborne composite coatings, G/WEP/WPU-0wt% has the least corrosion current density value of 5.07×10 -12 A/cm 2 . The comprehensive analysis suggests that the graphene improves the bonding performance of the primer and topcoat in the case of oily composite coating leading to the improvement in the surface quality of the topcoat and increase the coating's ability to resist the penetration of corrosive media. For waterborne composite coatings, the hydrophobic graphene improves the hydrophobicity of the primer coat, and therefore, the curing quality of the waterborne polyurethane topcoat is deprived that weakens the corrosion resistance of the waterborne composite coating.

show abstract

Graphene Modified Epoxy Coating Tubing Applied in the Water Injection Wells

Cited by 2 publications

References 0 publications

The Corrosion Resistance of Graphene-Modified Oily Epoxy Coating on AZ31 Magnesium Alloys

The Corrosion Resistance of Graphene-Modified Oily Epoxy Coating on AZ31 Magnesium Alloys

Study on Corrosion Resistance of AZ31 Magnesium Alloy Coated with Graphene Modified Epoxy and Polyurethane Coatings

Contact Info

Product

Resources

About