Inhibition Effect of Imidazoline Phosphate on Galvanic Corrosion of 7075 Al-alloy in Neutral NaCl Solution

doi:10.11902/1005.4537.2025.050

Journal of Chinese Society for Corrosion and protection

2025, Vol. 45

Issue (6): 1734-1740 DOI: 10.11902/1005.4537.2025.050

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Inhibition Effect of Imidazoline Phosphate on Galvanic Corrosion of 7075 Al-alloy in Neutral NaCl Solution

RUAN Zhibang¹, WEI Shixuan¹, WANG Shupeng¹, LV Zhengping², LI Gesheng¹, LI Yizhou²(

)

1 School of Naval Architecture, Ocean and Energy Power Engineering, Wuhan University of Technology, Wuhan 430070, China
2 College of Materials Science and Engineering, Ocean University of China, Qingdao 266100, China

Cite this article:

RUAN Zhibang, WEI Shixuan, WANG Shupeng, LV Zhengping, LI Gesheng, LI Yizhou. Inhibition Effect of Imidazoline Phosphate on Galvanic Corrosion of 7075 Al-alloy in Neutral NaCl Solution. Journal of Chinese Society for Corrosion and protection, 2025, 45(6): 1734-1740.

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Abstract

Herein, the inhibition effect of imidazoline phosphate on the galvanic corrosion of 7075 Al-alloy in 3.5%NaCl solution was investigated by means of electrochemical tests and scanning electron microscopy as well as molecular dynamics simulation. The results indicate that the AlCuFeMn phase within the 7075 Al-alloy can induce micro galvanic corrosion effects, leading to pitting corrosion. When coupled with X70 steel, the galvanic effect significantly accelerates the progression of local corrosion. After the addition of imidazoline phosphate, the 7075 Al-alloy exhibits weak passivation characteristics, regardless of it is coupled with X70 steel or not. Notably, no obvious local corrosion occurs on the surface of the 7075 Al-alloy after immersion, suggesting that imidazoline phosphate exhibits a positive inhibitory effect on the corrosion and galvanic corrosion of the 7075 Al-alloy. Molecular dynamics simulation reveals that the adsorption energy of inhibitor molecular on the surface of Al, Fe, Cu, and Al₂O₃ is considerably higher than that of corrosive substances such as O₂, Cl^-, H₂O and H₃O⁺. This suggests that a protective film may form on the metal surface, thereby inhibiting the corrosion of Al- alloys.

Key words: inhibitor Al-alloy galvanic corrosion electrochemical test

Received: 15 February 2025 32134.14.1005.4537.2025.050

ZTFLH:

TG174

Fund: National Natural Science Foundation of China(52471101);National Natural Science Foundation of China(51901217)

Corresponding Authors: LI Yizhou, E-mail: liyizhou@ouc.edu.cn

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	RUAN Zhibang
	WEI Shixuan
	WANG Shupeng
	LV Zhengping
	LI Gesheng
	LI Yizhou

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https://www.jcscp.org/EN/10.11902/1005.4537.2025.050 OR https://www.jcscp.org/EN/Y2025/V45/I6/1734

Fig.1 Molecular structure of SIP

Fig.2 Polarization curves of 7075-T651 Al-alloy immersed for 24 h in 3.5%NaCl solutions without and with 200 mg/L SIP

Fig.3 Polarization curves of 7075-X70 coupling specimen after immersion for 24 h in 3.5%NaCl solutions without and with 200 mg/L SIP

Fig.4 Nyquist diagrams of 7075-T651 Al-alloy (a) and 7075-X70 coupling specimen (b) after immersion for 24 h in 3.5%NaCl solutions without and with 200 mg/L SIP

Fig.5 Equivalent circuit models for fitting Nyquist diagrams of 7075-T651 Al-alloy (a) and 7075-X70 coupled specimen (b) in 3.5%NaCl solutions without and with 200 mg/L SIP

Table 1 Fitting parameters of Nyquist diagrams of 7075 Al-alloy immersed for 24 h in 3.5%NaCl solutions without and with 200 mg/L SIP

Table 2 Fitting parameters of Nyquist diagrams of 7075-X70 coupling specimen immersed for 24 h in 3.5%NaCl solutions without and with 200 mg/L SIP

Fig.6 Polarization resistances of 7075-T651 Al-alloy and 7075-X70 coupling specimen after immersion for 24 h in 3.5%NaCl solutions without and with 200 mg/L SIP

Fig.7 Micro morphologies of 7075-T651 Al-alloy immersed for 24 h in 3.5%NaCl solutions without (a) and with (b) 200 mg/L SIP

Fig.8 Micro morphologies of 7075-X70 coupling specimen after immersion for 24 h in 3.5%NaCl solutions without (a) and with (b) 200 mg/L SIP

Fig.9 Final adsorption configurations of SIP on Al (a), Al₂O₃ (b), Fe (c) and Cu (d) in aqueous solution

Table 3 Adsorption energies E_interaction of SIP on Al, Al₂O₃, Fe and Cu

[1]	Qiao Z, Li Q Q, Liu X H, et al. Effect of nitrate and galvanic couple on crevice corrosion behavior of 7075-T651 Al-alloy in neutral NaCl solution [J]. J. Chin. Soc. Corros. Prot., 2024, 44: 1047
	(乔泽, 李清泉, 刘晓航等. 中性氯化钠溶液中硝酸根和电偶对7075-T651铝合金缝隙腐蚀行为影响研究 [J]. 中国腐蚀与防护学报, 2024, 44: 1047)
[2]	Shi L J, Yang X Y, Song Y W, et al. Effect of corrosive media on galvanic corrosion of complicated tri-metallic couples of 2024 Al alloy/Q235 mild steel/304 stainless steel [J]. J. Mater. Sci. Technol., 2019, 35: 1886
[3]	Cui T F, Liu D X, Shi P A, et al. Effect of NaCl concentration, pH value and tensile stress on the galvanic corrosion behavior of 5050 aluminum alloy [J]. Mater. Corros., 2016, 67: 72
[4]	Xing S H, Li Y, Wharton J A, et al. Effect of dissolved oxygen and coupled resistance on the galvanic corrosion of Cr-Ni low-alloy steel/90-10 cupronickel under simulated deep sea condition [J]. Mater. Corros., 2017, 68: 1123
[5]	Zhang G A, Yu N, Yang L Y, et al. Galvanic corrosion behavior of deposit-covered and uncovered carbon steel [J]. Corros. Sci., 2014, 86: 202
[6]	Zhu H X, Huang Z Y, Jin G F, et al. Effect of temperature on galvanic corrosion of Al 6061-SS 304 in nitric acid [J]. Energy Rep., 2022, 8(suppl.14): 112
[7]	Du G, Lu G Q, Deng L H, et al. Effect of aluminum content on corrosion behavior of Ni-Al alloys in dilute sulfuric acid solution [J]. J. Chin. Soc. Corros. Prot., 2024, 44: 1011
	(杜广, 芦国强, 邓龙辉等. 铝含量对镍铝合金在稀硫酸溶液中的腐蚀行为影响 [J]. 中国腐蚀与防护学报, 2024, 44: 1011)
[8]	Li Y, Tang Y X, Liu X H, et al. Insight into the crevice corrosion mechanism of AA7075-T651 high-strength aluminum alloys in neutral nitrate solution: the effect of Cl^- [J]. Mater. Corros., 2024, 75: 1373
[9]	Zheng X Z, Castaneda H, Gao H J, et al. Synergistic effects of corrosion and slow strain rate loading on the mechanical and electrochemical response of an aluminium alloy [J]. Corros. Sci., 2019, 153: 53
[10]	Wang L W, Liang J M, Li H, et al. Quantitative study of the corrosion evolution and stress corrosion cracking of high strength aluminum alloys in solution and thin electrolyte layer containing Cl^- [J]. Corros. Sci., 2021, 178: 109076
[11]	Zhang F, Nilsson J O, Pan J S. In situ and operando AFM and EIS studies of anodization of Al 6060: Influence of intermetallic particles [J]. J. Electrochem. Soc., 2016, 163: C609
[12]	Wang Q L, Li H J. Study on anodic oxidation of 2099 aluminum lithium alloy and sealing treatment in environmental friendly solutions [J]. Int. J. Electrochem. Sci., 2023, 18: 100186
[13]	Williams G, Coleman A J, Neil McMurray H. Inhibition of aluminium alloy AA2024-T3 pitting corrosion by copper complexing compounds [J]. Electrochim. Acta, 2010, 55: 5947
[14]	Zhang S, Zhang T, He Y T, et al. Long-term atmospheric pre-corrosion fatigue properties of epoxy primer-coated 7075-T6 aluminum alloy structures [J]. Int. J. Fatigue, 2019, 129: 105225
[15]	Wysocka J, Cieslik M, Krakowiak S, et al. Carboxylic acids as efficient corrosion inhibitors of aluminium alloys in alkaline media [J]. Electrochim. Acta, 2018, 289: 175
[16]	Wysocka J, Krakowiak S, Ryl J. Evaluation of citric acid corrosion inhibition efficiency and passivation kinetics for aluminium alloys in alkaline media by means of dynamic impedance monitoring [J]. Electrochim. Acta, 2017, 258: 1463
[17]	Cheng X Y, Ye H, Guo C H, et al. Molecular dynamics simulation of diffusion behavior of benzotriazole and sodium benzoate in volatile corrosion inhibitor film [J]. J. Chin. Soc. Corros. Prot., 2024, 44: 1323
	(程学雨, 叶桓, 郭程皓等. 苯骈三氮唑与苯甲酸钠在气相防锈膜中扩散机理的分子动力学模拟研究 [J]. 中国腐蚀与防护学报, 2024, 44: 1323)
[18]	Shi C J, Lei R, Deng S D, et al. Corrosion inhibition of Erigeron canadensis L. extract for steel in HCl solution [J]. J. Chin. Soc. Corros. Prot., 2024, 44: 1189
	(石成杰, 雷然, 邓书端等. 小蓬草提取物对钢在HCl介质中的缓蚀作用 [J]. 中国腐蚀与防护学报, 2024, 44: 1189)
[19]	Liu X H, Li Y Z, Lei L, et al. The effect of nitrate on the corrosion behavior of 7075-T651 aluminum alloy in the acidic NaCl solution [J]. Mater. Corros., 2021, 72: 1478
[20]	Zhang W Y, Zhang D Q, Li X H, et al. Excellent performance of dodecyl dimethyl betaine and calcium gluconate as hybrid corrosion inhibitors for Al alloy in alkaline solution [J]. Corros. Sci., 2022, 207: 110556
[21]	Liu J, Wang D P, Gao L X, et al. Synergism between cerium nitrate and sodium dodecylbenzenesulfonate on corrosion of AA5052 aluminium alloy in 3wt.%NaCl solution [J]. Appl. Surf. Sci., 2016, 389: 369
[22]	Tian W M, Li S M, Wang B, et al. Pitting corrosion of naturally aged AA7075 aluminum alloys with bimodal grain size [J]. Corros. Sci., 2016, 113: 1
[23]	Wang S J, Cao Y M, Liu X H, et al. In situ electrochemical monitoring of the crevice corrosion process of the 7075-T651 aluminium alloy in acidic NaCl and NaNO₃ solution [J]. Materials, 2023, 16: 2812
[24]	Zhang Q H, Hou B S, Zhang G A. Inhibitive and adsorption behavior of thiadiazole derivatives on carbon steel corrosion in CO₂-saturated oilfield produced water: Effect of substituent group on efficiency [J]. J. Colloid Interface Sci., 2020, 572: 91
[25]	Zhao H X, Zhang X H, Ji L, et al. Quantitative structure-activity relationship model for amino acids as corrosion inhibitors based on the support vector machine and molecular design [J]. Corros. Sci., 2014, 83: 261

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