ELECTROCHEMISTRY
·
2016
·Vol. 84
·期 12
·948-952
·
IF 0.791
Xiyun YANG,Ling RAN,Shenghai YANG
Anodic dissolution of zirconium in Bun4NBr-containing n-butanol solutions was investigated using cyclic voltammetry, linear sweep voltammetry and potentiostatic current–time transient and scanning electron microscopy (SEM). Zirconium did not exhibit active dissolution due to passivation in the potential region of 0.2 to 1.2 V vs. SCE. The zirconium dissolution in passive state was under mass transfer control. Pitting corrosion took place as a result of passivity breakdown by Br− anions and the typical steady-state pitting potential was between 1.55–1.60 V vs. SCE in n-butanol solutions containing 0.08 M Bun4NBr. SEM images confirmed the occurrence and the intensification of pits with an increase of potential. Increasing Bun4NBr concentration accelerated the pit nucleation and growth. The reaction order leading to pit nucleation process was 1.0 with respect to bromide anions. The dissolution of zirconium in n-butanol solution produced Zr(OC4H9)4.
研究领域:
电化学
·
材料科学
✓ 已验证
DOI
高影响因子
CORROSION SCIENCE
·
2025
·
IF 8.5
Xinyu Li,Songmei Li,Juan Du,Jinyan Zhong,Mei Yu,Bin Li
The effect of TiC on corrosion process, particularly the passive and initial stages, is unclear. The passivation and initial corrosion of 2024-TiC AMCs are investigated in this report. It is found that a small amount of TiC improves corrosion resistance by reducing galvanic corrosion current density and forming a stable passive layer with low Cl⁻ adsorption and cation vacancy density, minimizing dissolution. However, excessive TiC causes uneven distribution, aggregation of Cl⁻, and passive film rupture, leading to anode aluminum dissolution and accelerated pitting corrosion propagation. These findings highlight the balance requirement for optimal TiC additive used in enhancing corrosion resistance.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2022
·Vol. 15
·期 5
·1622
·
IF 3.748
Guonan Liu,Jilei Xu,Baojing Feng,Jinhui Liu,Dongqing Qi,Wenzhan Huang,Peixu Yang,Shaojun Zhang
Adjusting the microstructure through the deformation process is one of the ways to improve the properties of Mg alloys. Most studies have focused on the influence of the microstructure after deformation treatment on the mechanical properties of Mg alloys. In this paper, extruded and forged Mg-Gd-Y-Nd-Zr alloys were selected to investigate the corrosion performance of two deformed magnesium alloys immersed in 0.6 M NaCl solution using a hydrogen evolution test, a weight loss test, an immersion experiment, and an electrochemical test. The results showed that WE43 alloys undergoing different deformation treatments presented different microstructures, which led to different corrosion behaviors and corrosion resistance. The extruded WE43 alloy showed uniform corrosion, while the forged WE43 alloy suffered severe local galvanic corrosion. Meanwhile, the corrosion rate of the forged WE43 alloy was about four times faster than that of the extruded WE43 alloy.Keywords:magnesium;rare earth elements;erosion;weight loss;pitting corrosion
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Materials
·
2020
·Vol. 13
·期 12
·2719
·
IF 3.057
Yan Jiang,Junfeng Yang,Zhuoming Xie,Qianfeng Fang
The biggest obstacle for the application of tungsten as the target materials in the spallation neutron source is its serious corrosion in the coolant of flowing water. For this reason, W–Cr–C clad tungsten was developed by tungsten carburizing in a spark plasma sintering device, with superior corrosion resistance in the static immersion and electrochemical corrosion test. This work focused on its erosion and corrosion performance in a flowing water system, based upon test parameters simulated under the service conditions. W–Cr–C clad tungsten showed superior corrosion resistance to that of bare tungsten due to the corrosion form changing from the intergranular corrosion of bare tungsten to pitting corrosion of W–Cr–C coating. The corrosion rate of tungsten was as high as tenfold that of the coated sample at 20 °C, and at most fourfold at 60 °C after testing for 360 h. Effects of water velocity and temperature on pitting and intergranular corrosion were investigated in detail and their corresponding corrosion mechanisms were analyzed and discussed.Keywords:tungsten;W–Cr–C coating;carburization;intergranular corrosion;pitting corrosion
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Shanjian Li,Zekun Wang,Haoxuan He,Panfeng Wu
Pitting corrosion is a significant issue which significantly shorten the service life of carbon steel. In this study, imidazoline and thiourea are combined to assess the synergistic in the localized corrosion of Q235 carbon steel by a combined system. In detail, five different proportions of corrosion inhibitors are used in the simulated corrosion solution (5 wt. % NaCl + 0.5 wt. % CH 3 COOH + 1.0 wt. % Na 2 S) in the closed area to investigate the corrosion inhibition performance of Q235 steel at 80 °C. The corrosion behavior of the steel in the simulated solution was investigated using potentiodynamic polarization test and electrochemical impedance spectroscopy test. Due to the combination of imidazoline (IM) and thiourea (TU) corrosion inhibitors, the corrosion inhibitors in the simulated solution of the occlusion zone reduce the migration of corrosive anions to the occlusion zone and slowed the acidification of the solution resulting in lower concentrations of Cl - and S 2- to varying degrees and reaching a higher pH of the solution. As a result, the compounded corrosion inhibitors exhibit improved corrosion inhibition rate (80 mg/L IM+20 mg/L TU (86.91 %), 50 mg/L IM+ 50 mg/L TU (95.67 %), 20 mg/L IM+ 80 mg/L TU (86.16 %)) to Q235 steel, which is superior to that using imidazoline (63.42 %) or thiourea (92.77 %) alone. This enhanced performances fully prove the synergistic effect of imidazoline with thiourea.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2017
·Vol. 7
·期 1
·16
·
IF 2.175
Hejie Yang,Yimin Gao,Weichao Qin
The corrosion behavior of Ni-P coating deposited on 3003 aluminum alloy in flue gas condensate was investigated by electrochemical approaches. The results indicated that nitrite acted as a corrosion inhibitor. The inhibiting effect of nitrite was reduced in solutions containing sulfate or nitrate. Chloride and sulfate accelerated the corrosion of Ni-P coatings greatly. This can provide important information for the researchers to develop special Ni-P coatings with high corrosion resistance in the flue gas condensate.Keywords:electroless Ni-P coating;anion;3003 aluminum alloy;flue gas condensate;pitting corrosion
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2022
·
IF 4.865
Gengzhe Shen,Liuyan Zhang,Huishu Wu,Zhiwei Gu,Shixuan Wang,Yuwen Liu,Qiongbin Zheng,Guibin Tan,Xiaohua Jie
Cold spraying aluminum-based coatings are widely used for corrosion protection of metals such as steel and magnesium alloy . However, poor pitting resistance and short protection life are the shackles of aluminum-based coating. In order to solve this problem, this paper innovatively utilized the synergistic effect of reduced graphene oxide (rGO) and layered double hydroxide (LDH) to modify the coating efficiently. Al-GLG coatings were prepared by cold spraying rGO and LDH-modified aluminum powders. The structure, composition and corrosion resistance of the Al-GLG coating were analyzed and compared with that of unmodified Al-based coating and graphene-modified Al-based (Al-G) coating. As a result, the Al-GLG coating presents a continuous network GLG surrounding the deformed aluminum powder, and this special coating exhibits pitting resistance and long life. The corrosion current density of the Al-GLG coating is only 0.01287 μA·cm −2 , which is three orders of magnitude lower than that of the Al-based coating, and its pitting potential is about −0.24 V SCE , which is over 540 mV higher than that of the Al-based coating. During the full immersion text, the Al-GLG coating keeps the largest Rc (7.21×10 4 Ω·cm 2 ) and low-frequency impedance modulus|Z| 0.01Hz (3.66×10 4 Ω·cm 2 ). The corrosion resistance mechanism of the Al-GLG coating was investigated via field emission scanning electron microscope (FE-SEM), X-ray diffraction (XRD), Raman and X-ray photoelectron spectroscopy (XPS), respectively. The excellent pitting corrosion resistance of the Al-GLG coating is attributed to the synergistic effect of the shielding effect of reduced graphene oxide and the ion exchange inhibition effect of LDH.
研究领域:
材料科学
·
腐蚀与防护
✓ 已验证
产品关联
DOI
高影响因子
WEAR
·
2025
·
IF 6.1
Xin Xing,Kun Han,Congcong Shi,Yujuan Zhang,Shengmao Zhang,Wenjing Lou,Wenbin Kan,Xu Zhou
In this paper, the good disperse and particle size adjustability of cerium oxide (CeO 2 ) nanoparticles were achieved by solvothermal secondary growth method. The micro-pitting resistance of three CeO 2 nanoparticles (1.85 nm, 2.85 nm, 4.22 nm) in polyalphaolefin (PAO)and gear oil was evaluated by reciprocating step loading method. The results showed that micro-pitting corrosion occurred in base oil lubrication from low load to high load (150 N-350 N). After adding CeO 2 nanoparticles, at low load (150 N), 2.85 nm and 4.22 nm CeO 2 nanoparticles formed a discontinuous CeO 2 tribofilm through shear sintering to reduce the surface shear force and produce significant anti-wear effect. The 1.85 nm CeO 2 has a friction-reducing and anti-wear effect through direct contact with isolated friction pairs. The formation of micro-pitting corrosion is inhibited by the three particle sizes, and the anti-wear performance decreases with the increase of particle size. Under the condition of high load (350 N), the discontinuous single CeO 2 tribofilm spillage due to its limited load capacity, which leads to increased wear and inhibits the formation of micro-pitting. Under the condition of high load (550 N), the formula oil has a micro-pitting phenomenon. After adding CeO 2 nanoparticles, a composite tribofilm containing cerium phosphate and CeO 2 is formed through tribochemical reaction with phosphorous additives, which greatly improves the bearing capacity and anti-wear ability of the tribofilm. Even under the condition of 550 N high load, the three particle sizes of CeO 2 nanoparticles have significant anti-wear effect and low friction properties, and all inhibit the formation of micro-pitting corrosion, among which 2.85 nm particle size of CeO 2 has the best anti-wear ability.
研究领域:
纳米材料
·
摩擦学
·
材料科学
·
化学合成
·
机械工程
✓ 已验证
产品关联
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2023
·
IF 5.4
Jiabei Zhang,Yucheng Wu,Zhaoyang Zhang,Shicheng Sun,Shaojing Gu,Shuai Yang,Hao Zhu
Excessive P content (≥ 10 wt%) easily leads to cracks on the surface of electrodeposited Ni P coatings, causing rapid deterioration of corrosion performance. This study uses picosecond laser remelting (LR) technology to close cracks and improve corrosion performance. The influence of the laser parameters on the quality of laser-remelted (LRed) coatings in ambient air is discussed in detail, and the corrosion performance is evaluated through electrochemical corrosion tests. The results indicated that the scanning rate, laser power, and repetition frequency significantly affect the degree of crack closure and LRed defects. For cracks of similar sizes, both multiple-LR with a lower power (10.4 W, five times) and single-LR with a higher power (19.2 W, once) achieved an excellent crack closure. After single-LR, the surface roughness increased from 3.9 ± 0.3 nm to 33.4 ± 3.2 nm. In addition, the LRed layer crystallized from the initial amorphous state. Although the energy-dispersive spectroscopy results indicated that the oxidation behavior during the LR process was insignificant, X-ray photoelectron spectroscopy showed that the surface composition evolved from Ni/Ni–P compounds to Ni–POx after LR. Electrochemical corrosion tests indicated that the corrosion current density decreased approximately three times from 9.19 × 10 −6 to 2.91 × 10 −6 A/cm 2 after LR. Moreover, the corrosion mechanism shifted from the original stress corrosion to pitting corrosion . Thus, the LR technology can effectively improve the corrosion performance and reduce the issues caused by cracks.
研究领域:
材料科学
·
电化学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）