Princeton Applied Research and Solartron Analytical’s Post

Localized Electrochemical Impedance Spectroscopy (LEIS ) is a technic performed using the Scanning Electrochemical Microscope (SECM) Whether to help study and improve the corrosion resistance of the body a battery pack or understanding the impact of coating on the body of a vehicle, LEIS can provide insights into the electrochemical behavior of localized corrosion phenomena. This application note courtesy Zhao and Yang groups at the Beijing Institute of Petrochemical Technology shares more. https://lnkd.in/dQFDibyS #ametek #SECM #batterytechology

⚡️ Exploring Electrochemical Corrosion Studies of Various Metals ⚙️ Corrosion remains a significant challenge across industries and daily life, leading to substantial economic impacts. Our latest application note compares electrochemical corrosion studies of different metals. Dive deeper into our application note: https://bit.ly/3zR9W9I #Metrohm #MetrohmIndia #Corrosion #Electrochemistry #Vionic #Research

If you are interested in composite cryogenic storage, please look at our recently published review paper in the Journal of Composite Materials on the cryogenic fuel containment performance of such composites. In this paper, we review the major issues that composite storage tanks present, permeability allowables for such composites for space applications, and consolidate some known leakage barrier methodologies used to combat composites' microcracking in a cryogenic thermo-mechanical environment. https://lnkd.in/gY6HqUSd #reviewpaper #composite #cryogenic #tank Abstract: Fiber-reinforced polymer matrix composites are increasingly considered for lightweight cryogenic pressure vessels due to their excellent combination of tailorability, specific mechanical properties, and relatively low coefficients of thermal expansion. However, significant challenges must be overcome to fully utilize PMCs for cryogenic fuel tanks in terms of transverse microcracking and subsequent permeation of cryogenic fuel. Gas permeation and microcrack densities of cryogenically cycled composites are highly influenced by their layup, ply thickness, load case, and manufacturing defects like voids and resin rich zones. There has been a significant amount of research on measuring gas permeation of composites fatigued under pure thermal or uniaxial thermo-mechanical stresses. However, results demonstrate that the gas permeability should be measured under biaxial thermo-mechanical stresses to properly gauge the leakage characteristics of damaged composites. This paper summarizes the results from over a hundred papers on the key parameters that influence the gas permeability of composites, appropriate testing methods to cycle composites for permeability measurement, methods to limit the evolution of transverse microcracks, and materials traditionally used for the fabrication of all-composite cryogenic fuel tanks. Thin plies and nanofiller-toughening of the matrix have been shown to provide significant improvements in transverse microcrack suppression within cryogenically cycled composites.

The cyclic polarization test is one of the powerful electrochemical tools for investigating the localized corrosion behavior of metals under different environmental conditions. Its output typically appears as a plot of potential versus logarithm of current. Based on experience, the potential range applied is from -250 mV to +1500 mV relative to the open circuit potential(OCP), comprising a forward scan (direct scan) and a reverse scan. Depending on the direction of the reverse scan, one can infer the type of corrosion behavior of the specimen. If the reverse scan returns in front of the forward scan (positive hysteresis), the specimen is prone to pitting corrosion. Conversely, if the reverse scan returns behind the forward scan (negative hysteresis), the specimen is resistant to pitting corrosion. Positive hysteresis parameters such as repassivation potential and the area under the curve represent important concepts. If the cathodic branch intercepts the anodic branch at a point, the intersection point indicates the repassivation potential, beyond which the formation of new pits is not possible, and existing pits are covered by the passive layer. Furthermore, the area under the curve of sensitivity represents the susceptibility of the specimen to pitting corrosion, where a larger area indicates a higher sensitivity to pitting corrosion. Factors contributing to the enlargement of the cyclic polarization curve area include temperature increase, increase in chloride ion concentration, and pH. If you're working on the corrosion behavior of metals, you can use this test to assess the corrosion behavior of your sample under different environmental conditions #corrosion #electrochemical_test #localized_corrosion

Worth a quick read

Check out our article recently published in #CorrosionScience on (Effects of grain boundary chemistry and precipitate structure on intergranular corrosion in Al-Mg-Si alloys doped with Cu and Zn). https://lnkd.in/dU9_8dEU In this work, we investigated how low concentrations of scrap-related Cu and Zn can influence the microstructure and intergranular corrosion (IGC) resistance of Al-Mg-Si alloys. This work was conducted in collaboration with the Norwegian University of Science and Technology, Delft University of Technology, SINTEF Industry, and Hydro Extrusions. #NorwegianUniversityofScienceandTechnology #TUDelft #SINTEFIndustry #HydroExtrusions Emad Hasan Bartawi, Calin Daniel Marioara, Ghada Shaban, Ehsan Rahimi, Oleg Mishin, Jonas Kristoffer Sunde, Yaiza Gonzalez Garcia, Randi Holmestad, and Rajan Ambat.

Learn about hydrogen distribution, location of pitting initiation, and coupling effect of hydrogen and precipitates on pitting in stainless steel sample in this article by Ming Liu, Guanghu Yao, Xuehan Wang, Lining Xu, Lang Jiao, Hang Su, and Anqing Fu: https://lnkd.in/g9EXAAKj #MaterialsScience #Corrosion #StainlessSteel #HydrogenEmbrittlement #PittingCorrosion #CorrosionResistance #Metallurgy #SurfaceEngineering #HydrogenEffect #PrecipitateStudy #HR3CSteel #CorrosionResearch #MetalScience #Electrochemistry

Corrosion of refractories in liquid aluminum processing furnaces is a major cause of wall degradation. A mechanism for chemical attack by Al-Mg alloys has been proposed in several of my publications.

highly recommended as choice of cleaning of heat exchangers is very critical in optimum inspection