Abstract The drastic distortion of potentiodynamic polarization curves measured at high potential scan rates prevents the extraction accurate kinetic parameters. In this work, we start by measuring AA7075 ranging from 0.167 mV·s ?1 to 100 , in an acidic 0.62 M NaH 2 PO 4 solution and a near-neutral 3.5 wt% NaCl solution. Changes are observed not only different electrolytes but also between repl...

The corrosion behavior of mild steel in 0.1 M aqueous sulfuric acid medium has been studied using weight loss, potentiodynamic polarization measurements, quantum chemical calculations, and molecular dynamic simulations in the presence and absence of 4-methyl-4H-1,2,4-triazole-3-thiol and 2-mercaptonicotinic acid. Potentiodynamic measurements indicate that these compounds mostly act as mixed inh...

we study copper corrosion inhibition by ethanolamine (eta)with (0, 0.2 ,0.3,0.4,0.5) vol.% concentrations in 100 ppm nacl solution. this work is carried out by potentiodynamic measurements and electrochemical impedance spectroscopy (eis). the substrates' surface morphologies are examined by scanning electron microscopy (sem). etais characterized by nmr spectra of eta1h and 13c and fourier ...

The present study aimed to evaluate the effect of Hot Isostatic Process (HIP) process on microstructure, phase stability and corrosion resistance Ti35Nb7Zr5Ta powder metallurgy alloys. titanium alloys was tested by analyzing open circuit potential (OCP), potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), ion release in physiological Fusayama solution. Polarization curve...

The dependences of the protective properties anodic oxide coatings on AD31 aluminum alloy surface modified with nitrates magnesium, potassium, and some 3d-elements composition sealing solutions parameters finishing treatment were established by scanning electron microscopy, potentiodynamic polarization, electrochemical impedance spectroscopy, salt spray chamber tests. A mechanism formation duri...

The corrosion resistance and anomalous hydrogen evolution of extruded cast powder metallurgical (PM) Mg-1Zn alloy were investigated. Potentiodynamic polarization revealed that the PM actively corroded at OCP due to enhanced cathodic kinetics, whereas remained spontaneously passive. HE measurements confirmed exhibited lower rates than alloy. Rp values for remarkably higher with over 90% charge r...

In this work, the results obtained from studying the corrosion of cast iron in freely aerated stagnant Arabian Gulf seawater (AGS) at room temperature were reported. The study was carried out using weight-loss (WL), cyclic potentiodynamic polarization (CPP), open-circuit potential (OCP), and electrochemical impedance spectroscopy (EIS) measurements and complemented by scanning electron microsco...

Abstract By the example of study AISI 1016 steel corrosion in HCl solution, potentialities various methods for determining currents are studied. The rate without polarization is determined using method measuring ohmic resistance test specimen. It shown that iterative used analysis potentiodynamic curves vicinity potential avoids complications arise when Tafel extrapolation absence pronounced se...