Xiaogang li

University of Science and Technology Beijing | USTB · School of Materials Science and Engineering

Bacillus cereus ( B. cereus ) is observed to have varying effects on the stress corrosion cracking (SCC) sensitivity of different microstructures in the simulated heat-affected zone (HAZ) of X80 steel. At open circuit potential (OCP), the SCC sensitivity of different microstructures increased from 3.40–7.49% in an abiotic medium to 10.22–15.17% in...

This work tuned the microstructure of laser powder bed fusion (LPBF) CoCrFeMnNi HEAs by different heat treatment processes to improve the corrosion resistance in the simulated proton exchange membrane fuel cells (PEMFCs) environment. Research indicated that different substructures influenced the electrochemical corrosion and passive behavior of the...

A high-throughput screening method for rapid laboratory evaluation of corrosion inhibitors was developed based on microarray consisting of up to 200 droplets of corrosion inhibitor solutions on one carbon steel substrate. The extent of corrosion on the steel under each single droplet was studied by tracking the variation of the 3D morphology of the...

The effect of hydrogen on the passivation behavior and electrochemical characteristics of selective laser melted (SLMed) 316L stainless steel in a simulated anode environment for a proton exchange membrane water electrolyzer (PEMWE) was studied. The results indicate that hydrogen charged into the sample increased the ratio of superficial Fe²⁺/Fe³⁺...

This research examines how Nb affects the stress corrosion cracking (SCC) behavior of various heat-affected zone (HAZ) microstructures of E690 steel in simulated saltwater under cathodic protection. The results showed that the Nb is in the form of solid solution in coarse-grain HAZ (CGHAZ). In fine-grain HAZ and intercritical HAZ (ICHAZ), the nanos...

Duplex stainless steel is widely used in the petrochemical, maritime, and food industries. However, duplex stainless steel has the problem of corrosion failures during use. This topic has not been comprehensively and academically reviewed. These factors motivate the authors to review the developments in the corrosion research of duplex stainless st...

The behavior and mechanisms of the stress-assisted microbiologically influenced corrosion (MIC) of X80 pipeline steel induced by sulfate-reducing bacteria (SRB) were investigated using focused ion beam-scanning electron microscopy (FIB). Electrochemical results show that SRB and stress have a synergistic effect on the corrosion of X80 steel. SRB ac...

ADPKD is a genetic disorder with a molecular complexity that remains poorly understood. In this study, we sampled renal cells to construct a comprehensive and spatiotemporally resolved gene expression atlas in whole Pkd1 mutant polycystic mouse kidneys at single-cell resolution. We characterized cell diversity and identified novel collecting duct (...

TP53 is the most common mutated gene in human cancer. Mutant p53 protein loses its tumor-suppressor properties and gains oncogenic activity. Mutant p53 is a therapeutic target in a broad range of cancer types. However, how mutant p53 is epigenetically regulated during tumor progression remains elusive. In this study, we found that the upregulation...

In this work, the atmospheric corrosion of carbon steels was monitored at six different sites (and hence, atmospheric conditions) using Fe/Cu-type atmospheric corrosion monitoring technology over a period of 12 months. After analyzing over 3 million data points, the sensor data were interpretable as the instantaneous corrosion rate, and the atmosph...

Hydrogen energy, whether in generation plants or utilization facilities, plays a decisive role in the mission to achieve net-zero greenhouse gas emissions, all to minimize pollution. The growing demand for clean energy carrier steadily accelerates the development of hydrogen production processes, and therein proton exchange membrane (PEM) water ele...

Uniform corrosion and stress corrosion cracking (SCC) of high-strength low-alloy steels with different microstructures in marine environment were investigated. The results show that microstructures (granular bainite, granular bainite and ferrite and tempered sorbite) significantly affect the uniform corrosion rate and SCC susceptibility, but the or...

Autosomal dominant polycystic kidney disease (ADPKD) is driven by mutations in the PKD1 and PKD2 genes and is characterized by renal cyst formation, inflammation and fibrosis. Forkhead box protein M1 (FoxM1), a transcription factor of the Forkhead box (Fox) protein super family, has been reported to promote tumor formation, inflammation and fibrosi...

Organic coatings are one of the most used and versatile technologies to mitigate corrosion of metals. However, organic coatings are susceptible to defects and damages that may not be easily detected. If not repaired timely, these defects may develop into major coating failures due to corrosion occurring in the damaged region, thereby limiting the l...

In this work, microstructure and sulfide stress corrosion cracking (SSCC) of 304 stainless steel (SS) pre-strained at cryogenic and room temperature were studied. 304 SS exhibits extremely high SSCC susceptibility, which increases as pre-strain rises for the acceleration of AD and HE. Cryogenic pre-strained specimens present higher SSCC resistance....

Corrosion jeopardizes the materials longevity and engineering safety, hence the corrosion rate needs to be forecasted so as to better guide materials selection. Although field exposure experiments are dependable, the prohibitive cost and their time-consuming nature make it difficult to obtain large dataset for machine learning. Here, we propose a s...

DNA damage response (DDR) is an important signaling-transduction network that promotes the repair of DNA lesions which can induce and/or support diseases. However, the mechanisms involved in its regulation are not fully understood. Recent, studies suggest that the peroxiredoxin 5 (Prdx5) enzyme, which detoxifies reactive oxygen species is associate...

In the hydraulic fracturing process, proppant is a crucial substance that holds a fracture open after creating and generating conduits for oil/natural gas movement in the wellbore. With the expansion of unconventional oil and natural gas development, hydraulic fracturing is rapidly becoming essential and fostering the growth of proppant. Historical...

An equiatomic FeCoCrNi high entropy alloy (HEA) with high strength and excellent hydrogen embrittlement (HE) resistance is manufactured by the precipitation of nano-sized NbC during thermo-mechanical processing. NbC precipitates make the HEA obtain extraordinary mechanical properties via pinning dislocations. With the precipitation strengthening al...

In this work, hydrogen effects on passivation and stress corrosion cracking (SCC) of 2205 duplex stainless steel (DSS) in acidified seawater were investigated. Results show hydrogen deteriorates passive film, accelerates localized anodic dissolution (AD) and causes hydrogen damage, leading to high SCC susceptibility by hydrogen embrittlement (HE) a...

Corrosion behavior on the building plane (XY-plane) and building direction plane (XZ-plane) of laser powder bed fusion (LPBF) Al-Mn-Mg-Sc-Zr alloy was investigated based on microstructure characterization coupled with corrosion measurements. The results demonstrate that localized corrosion preferentially occurs at the molten pool boundaries of both...

The corrosion and passive behavior of the as-cast AlxCrFeNi3-x (x=0.6, 0.8, 1.0 in molar ratio) high entropy alloys in 3.5 wt. % NaCl solution at room temperature was investigated by the electrochemical impedance spectroscopy, potentiodynamic polarization measurement, Mott-Schottky measurement, X-ray photoelectron spectroscopy tests, and scanning K...

Atmospheric galvanic corrosion behavior of low hydrogen embrittlement Cd-Ti plated (LHE Cd-Ti) 300M steel coupled with anodized TC4 titanium alloy was investigated in different natural environments. The galvanic corrosion between LHE Cd-Ti 300M steel and anodized TC4 titanium alloy exists in both atmospheres, and high concentrations of Cl⁻ and SO4²...

In this work, the electrochemical corrosion and passive behavior of a high-nitrogen austenite stainless steel named QN2109 in different NaCl solutions were studied by potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), Mott-Schottky analysis and X-ray photoelectron spectroscopy (XPS). QN2109 stainless steel exhibited a wide...

The integral effects of Ca and Sb on the corrosion properties of E690 steel were studied in a simulated tropical marine environment through immersion and dry/wet cyclic tests, focusing on localized and long-term corrosion properties. Results showed that Ca improved the corrosion resistance of steel by modifying the MnS inclusion into MnS-CaAl2O4 in...

Autosomal dominant polycystic kidney disease (ADPKD) is a debilitating renal neoplastic disorder with limited treatment options. It is characterized by the formation of large fluid-filled cysts that develop from kidney tubules through abnormal cell proliferation and cyst-filling fluid secretion driven by cAMP-dependent Cl ⁻ secretion. We tested the...

Oil shale constitutes an important proportion of unconventional resources, and its efficient exploitation helps alleviate the Chinese oil shortage situation. Nowadays, microwave heating is a promising method for in situ development of oil shale. However, the corresponding numerical simulation lacks in guiding the retorting optimization under microw...

The effect of Al addition on the microstructure and corrosion behavior of CoNiVAlx medium entropy alloys (MEAs) was investigated. Results indicated that the enhanced corrosion resistance caused by Al addition might be attributed to the dominant role of Al in stabilizing the passive film. The difference in the Volta potentials of FCC and B2 phases i...

The mechanical and corrosion fatigue properties of Q690 bridge steels produced by two different process were comparatively investigated. The steel produced by thermal-mechanical controlled processing (TMCP) and tempering had a slightly superior corrosion fatigue property to that produced by intercritical quenching & tempering (IQT). However, the TM...

Hydrogen-induced cracking (HIC) behavior and mechanism of E690 welded joint in simulated seawater were studied via microstructure observations, electrochemical hydrogen charging, slow strain rate tension (SSRT) tests and hydrogen content measurement. The results show that the welded joint of E690 steel has a higher HIC susceptibility than that of b...

We investigated the hydrogen-assisted failure behavior of partially recrystallized carbon alloyed equiatomic CoCrFeMnNi high-entropy alloys. Microstructural evolution in the vicinity of the crack initiation sites and propagation pathways was observed. The results showed that fracture of the samples in the presence of hydrogen was dominated by local...

The degradation of passive films of a stainless steel by S. algae was investigated at the single-cell level. The focused ion beam-scanning/transmission electron microscopy showed that the passive film underneath the adherent S. algae cell was significantly thinner than that without bacterial coverage after 3 days of inoculation. Atomic force micros...

This work studied the influence of cold deformation on the microstructure evolution and corrosion behavior of selective laser melted (SLMed) 316L stainless steel in a simulated cathode environment for proton exchange membrane fuel cells (PEMFCs). Results indicated that at < 50% deformation levels, the corrosion resistance was improved with an incre...

Autosomal dominant polycystic kidney disease (ADPKD) is a genetic disorder, which is caused by mutations in the PKD1 and PKD2 genes, characterizing by progressive growth of multiple cysts in the kidneys, eventually leading to end-stage kidney disease (ESKD) and requiring renal replacement therapy. In addition, studies indicate that disease progress...

The effect of electrochemical hydrogen charging on the mechanical property and corrosion behavior of Ti-3Mo alloy was investigated. Failure analysis revealed that the crack initiation and propagation were not along the crack tip of HICs although the existence of preferential cracking in α phase. The crack tended to propagate along the α/β interface...

Shewanella oneidensis MR-1 is an attractive model microbe for elucidating the biofilm-metal interactions that contribute to the billions of dollars in corrosion damage to industrial applications each year. Multiple mechanisms for S. oneidensis-enhanced corrosion have been proposed, but none of these mechanisms have previously been rigorously invest...

The pyrolysis characteristics of oil shale during heat treatment dominate the oil production of kerogen. In this study, the pyrolysis characteristics of oil shale in a laboratory microwave apparatus were investigated based on a novel fully coupled three-dimensional electromagnetic-thermal-chemical-hydraulic model according to the experimental micro...

Medium/high-entropy alloys (MEAs/HEAs) have become one of the primary research highlights in the material field due to their superior microstructure and mechanical properties. By means of molecular dynamic (MD) simulation, the tensile behavior of polycrystalline Fe80-xMnxCo10Cr10 (x=20, 30, 40, 50) MEAs was investigated under uniaxial stretching. T...

Machine-learning and big data are among the latest approaches in corrosion research. The biggest challenge in corrosion research is to accurately predict how materials will degrade in a given environment. Corrosion big data is the application of mathematical methods to huge amounts of data to find correlations and infer probabilities. It is possibl...

This study compares and analyzes the morphology, size, oxygen content, and microstructure of virgin and recycled powders after six iterations to assess the mechanical properties of the Hastelloy X alloys fabricated via laser powder bed fusion (LPBF). Compared to the virgin powder, the average particle size and oxygen content for the recycled powder...

The effect of nitrate-reducing bacteria (NRB) on the hydrogen embrittlement of X80 steel in a near-neutral pH solution was studied by various tests. NRB promote the formation of numerous pits under static load after 120 days and enlarge the polarization current at the same polarization potential. The increasing probability of hydrogen penetration i...

Electrochemical etching method has been used to construct anode aluminum foils with large surface area for electrolytic capacitor application. The applied current concentrated on surface defects would cause excessive corrosion of aluminum substrate and accelerate the initiation of merged tunnels. Self-assembly treatment with sodium oleate presents...

For the desorption of methane, thermal stimulation is an alternative to develop coalbed methane (CBM) when it is difficult to reduce the formation pressure. Microwave heating is a promising thermal method to increase the gas recovery of CBM especially for the CBM reservoir with high heterogeneity and low water content. The current study aims to est...

In this work, the impact of a wild-type nitrate-reducing Bacillus licheniformis strain on the corrosion behavior of X80 steel under anaerobic conditions was studied by electrochemical tests and biofilm characterization. The bioelectrochemical, electrochemical, and chemical reactions between X80 steel and microorganisms were investigated comprehensi...

The magnetic-property changes in sintered NdFeB magnets with different content of Dy and Nb after electrochemical hydrogen charging (EHC) were investigated. The phases of Dy2Fe14B, NbFeB, and Fe2Nb are confirmed by energy-dispersive spectrometry (EDS) and selected area electron diffraction. The electron back-scatter diffraction (EBSD) and electroch...

Herein, we report the development of a self-sensing and active corrosion protection coating which incorporates pH-sensitive multilayer chitosan/alginate-covered CaCO3 microcontainers containing 1,10-phenanthrolin-5-amine (APhen). The microcontainers can respond to pH variation to release APhen which serves not only as a corrosion indicator but also...

This work investigated the chemical and electrochemical mechanisms of localised corrosion triggered by CaS•xMgO•yAl2O3•TiN complex inclusions in high strength low alloy steel (HSLAS) under a simulated marine environment. Special focus was given to the role of the TiN portion of the inclusion on the initiation and growth of the corrosion pits. The t...

The effects of hydrogen charging on the electrochemical and stress corrosion cracking (SCC) behavior of X70 steel in a simulated deep seawater environment were investigated by using electrochemical measurements, slow strain rate tensile (SSRT) tests, and corrosion morphology characterization through SEM. The results showed that the concentrations o...

This study aims at providing systematically insights to clarify the impact of cathodic polarization on the stress corrosion cracking (SCC) behavior of 21Cr2NiMo steel. Slow-strain-rate tensile tests demonstrated that 21Cr2NiMo steel is highly sensitive to hydrogen embrittlement at strong cathodic polarization. The lowest SCC susceptibility occurred...

The influence of outward extracellular electron transfer (EET) of Pseudomonas aeruginosa in accelerating corrosion of 304 stainless steel was investigated. With less NO3⁻ available as electron acceptor, P. aeruginosa biofilm accelerated the pitting corrosion. The ICP-MS and XPS results indicated that P. aeruginosa promoted the bioreductive dissolut...

In the present work, the distribution of sulfate-reducing-bacteria (SRB) inside the crevice and the effect of crevice width on SRB-induced corrosion of stainless steel 316L (SS 316L) were systematically investigated. A cambered crevice configuration consisting of a convex lens and a wire beam electrode (WBE) was employed to measure the current and...

21Cr2NiMo steel is widely used to stabilize offshore oil platforms; however, it suffers from stress-corrosion cracking (SCC). Herein, we studied the SCC behavior of 21Cr2NiMo steel in SO2-polluted coastal atmospheres. Electrochemical tests revealed that the addition of SO2 increased the corrosion current. Rust characterization showed that SO2 addit...

Bacillus licheniformis can take up electrons from X80 steel for nitrate reduction and accelerate corrosion. In this work, the routes B. licheniformis adopts for extracellular electron transfer (EET) were revealed using electrochemical tests, fluorescence staining, high performance liquid chromatography (HPLC) and weight loss tests, and their kineti...

Microwave heating (MWH) is a promising drying method for increasing the utilization efficiency of oil shale, but its drying mechanism is not understood completely. In this study, a fully coupled three-dimensional electromagnetic-thermal-multiphase transport model was developed to investigate the drying characteristics of oil shale under MWH. The mo...

In this work, a triple-action self-healing coating was fabricated to promote the corrosion protection of carbon steel based on a shape memory polymer (SMP) epoxy coating and polyaniline/benzotriazole (PANI/BTA) nanocapsules. The PANI/BTA nanocapsules had dual functions: (1) PANI as a saline (NaCl)-responsive gatekeeper could achieve the controllabl...

The stress corrosion cracking (SCC) behaviors of X100 pipeline steels with different heat-treated microstructures in carbonate/bicarbonate solution at various potentials were investigated in this study. Several analyses were performed using electrochemical measurements, slow strain rate tensile (SSRT) tests, scanning electron microscopy (SEM), and...

Oxidative stress is emerging as a contributing factor to the homeostasis in cystic diseases. However, the role antioxidant enzymes play in the pathogenesis of autosomal dominant polycystic kidney disease (ADPKD) remains elusive. Peroxiredoxin 5 (Prdx5) is an antioxidant enzyme that catalyzes the reduction of H2O2 and alkyl hydroperoxide and plays a...

The effect of hydrogen on stress corrosion cracking (SCC) of 2205 duplex stainless steel (DSS) with different microstructure in simulated deep-sea environments was studied through microstructure characterization, electrochemical measurements, hydrogen determination and slow strain rate tensile (SSRT) tests. Hydrogen degrades corrosion and SCC resis...

A carbon steel octene tube has leaked from the fusion zone and caused economic losses. The failure process and mechanism were investigated in this work, by means of scanning electron microscope, electron backscattered diffraction, energy-dispersive X-ray spectroscopy and Scanning Kelvin probe force microscopy. Results showed the failure was attribu...

The study reported the self-healing effect of damaged epoxy coatings on carbon steels via biomineralization by Shewanella putrefaciens in artificial seawater. The mineralization products accumulated in the coating scratch were composed of inorganic-organic hybrid matters. The EIS results demonstrated that the biomineralization could repair the corr...

The matrix of CoCrMoW alloy fabricated by selective laser melting is mainly γ-Co phase. ε-Co phase and secondary precipitate could form during the post-production heat treatments. In this work, two heat treatment routes, aging treatment at 750 oC and solution treatment at 1200 oC, were conducted. Effects of ε-Co phase and Co3(Mo,W)2Si precipitate o...