Estimation of kinetic parameters of the passive state of carbon steel in mildly alkaline solutions from electrochemical impedance spectroscopic and X-ray photoelectron spectroscopic data

2011 ◽  
Vol 56 (17) ◽  
pp. 5910-5918 ◽  
Author(s):  
X. Zhang ◽  
J.C. Wren ◽  
I. Betova ◽  
M. Bojinov
Keyword(s):  
Carbon Steel ◽  
Kinetic Parameters ◽  
Spectroscopic Data ◽  
Electrochemical Impedance ◽  
Passive State ◽  
Alkaline Solutions ◽  
X Ray ◽  
Electrochemical Impedance Spectroscopic

X-ray photoelectron spectroscopic and electrochemical impedance spectroscopic analysis of RuO2-Ta2O5 thick film pH sensors

2016 ◽  
Vol 931 ◽  
pp. 47-56 ◽  
Author(s):  
Libu Manjakkal ◽  
Katarina Cvejin ◽  
Jan Kulawik ◽  
Krzysztof Zaraska ◽  
Robert P. Socha ◽  
...  
Keyword(s):  
Thick Film ◽  
Spectroscopic Analysis ◽  
Electrochemical Impedance ◽  
Ph Sensors ◽  
X Ray ◽  
Electrochemical Impedance Spectroscopic

Role of Mn addition on the general corrosion and pitting corrosion behavior of 13Cr stainless steel

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Jun He ◽  
Lin Chen ◽  
Yanjing Su
Keyword(s):  
Stainless Steel ◽  
Corrosion Behavior ◽  
Photoelectron Spectroscopy ◽  
Electrochemical Impedance ◽  
Alkaline Solutions ◽  
General Corrosion ◽  
Content Type ◽  
X Ray ◽  
Product Film

Purpose The purpose of this study is to elucidate the effect of Mn addition on the corrosion behavior of stainless steel. Design/methodology/approach Chronoamperometry, quasi-steady-state polarization and electrochemical impedance spectroscopy were used to investigate the corrosion behavior of Mn added A13Cr-HS sample and original S13Cr samples. In addition, the corrosion product film was characterized by a field emission scanning electron microscope equipped with energy-dispersive spectroscopy and X-ray photoelectron spectroscopy. Findings The A13Cr-HS sample with 8 wt.% Mn addition maintained good general corrosion resistance in both acidic and alkaline solutions compared to the original S13Cr sample. Additionally, the A13Cr-HS sample had good pitting resistance in an alkaline solution containing Cl−, but a weaker resistance in an acidic solution. Originality/value The influence of Mn addition on the formation mechanism of the passive film was systematically analyzed.

A Comprehensive Electrochemical Impedance Spectroscopic Study of Passive Carbon Steel in Concrete Pore Water

2013 ◽  
Vol 160 (8) ◽  
pp. C316-C325 ◽  
Author(s):  
Samin Sharifi-Asl ◽  
Digby D. Macdonald ◽  
Ahmed Almarzooqi ◽  
Bruno Kursten ◽  
George R. Engelhardt
Keyword(s):  
Carbon Steel ◽  
Spectroscopic Study ◽  
Pore Water ◽  
Electrochemical Impedance ◽  
Electrochemical Impedance Spectroscopic

scholarly journals Corrosion Inhibition of the Galvanic Couple Copper-Carbon Steel in Reverse Osmosis Water

2011 ◽  
Vol 2011 ◽  
pp. 1-7 ◽  
Author(s):  
Irene Carrillo ◽  
Benjamín Valdez ◽  
Roumen Zlatev ◽  
Margarita Stoycheva ◽  
Michael Schorr ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Reverse Osmosis ◽  
Corrosion Inhibition ◽  
Heat Exchangers ◽  
Electrochemical Impedance ◽  
Galvanic Corrosion ◽  
Electrochemical Behaviour ◽  
Open Circuit ◽  
X Ray ◽  
Galvanic Couple

The purpose of this paper is to evaluate the electrochemical behaviour of corrosion inhibition of the copper-carbon steel galvanic couple (Cu-CS), exposed to reverse osmosis water (RO) used for rinsing of heat exchangers for heavy duty machinery, during manufacture. Molybdate and nitrite salts were utilized to evaluate the inhibition behaviour under galvanic couple conditions. Cu-CS couple was used as working electrodes to measure open circuit potential (OCP), potentiodynamic polarization (PP), and electrochemical impedance spectroscopy (EIS). The surface conditions were characterized by scanning electron microscopy (SEM) and electron dispersive X-ray spectroscopy (EDS). The most effective concentration ratio between molybdate and nitrite corrosion inhibitors was determined. The morphological study indicated molybdate deposition on the anodic sites of the galvanic couple. The design of molybdate-based corrosion inhibitor developed in the present work should be applied to control galvanic corrosion of the Cu-CS couple during cleaning in the manufacture of heat exchangers.

Structural, electrochemical and mechanical studies of ultrasonic irradiation enhanced electroplating Ni coating

2018 ◽  
Vol 65 (4) ◽  
pp. 333-339 ◽  
Author(s):  
Chaolei Ban ◽  
Shuqin Zhu ◽  
Jie Ma ◽  
Fangreng Wang ◽  
Zhengfeng Jia ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Ultrasonic Irradiation ◽  
Design Methodology ◽  
Electrochemical Impedance ◽  
Steel Substrate ◽  
X Ray Diffraction ◽  
Content Type ◽  
X Ray ◽  
Mechanical Studies

Purpose Ni coating was electroplated on carbon steel substrate to protect carbon steel. Design/methodology/approach During electroplating, the ultrasonic irradiation (UI) (1 kHz) action was in situ used with different frequency. The influence of UI on the microstructure, mechanical and electrochemical performance of the coating was studied with scanning electron microscopy, X-ray diffraction, microhardness measurement, polarization curves and electrochemical impedance spectroscopy. Findings The results show that comparing that without UI imposition, UI during electroplating can refine the coating grain and decrease the micro-pores in the coating, resulting in improvement of the coating corrosion and hardness. Originality/value The imposition of UI action during electroplating Ni coating can remove intrinsic pores in the coating and compact the coating. The potential bimetallic cell between substrate and plating layer can be insulated to enhance the corrosion resistance of Ni coating. The imposition of UI action during electroplating Ni coating can refine Ni coating grain size and improve the coating haredness.

scholarly journals Corrosion Performance and Rust Conversion Mechanism of Graphene Modified Epoxy Surface Tolerant Coating

2021 ◽  
Vol 8 ◽  
Author(s):  
Xiaoping Guo ◽  
Hao Xu ◽  
Jibin Pu ◽  
Chao Yao ◽  
Jing Yang ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Phytic Acid ◽  
Electrochemical Impedance ◽  
Steel Substrate ◽  
Salt Spray ◽  
Corrosion Performance ◽  
X Ray ◽  
Conversion Performance ◽  
Protective Performance ◽  
Modified Epoxy

A graphene modified epoxy surface tolerant coating was prepared, and the corrosion performance and rust conversion mechanism of the prepared composite coating on rusty carbon steel substrate was investigated. Scanning electron microscope (SEM), X-ray powder diffractometer (XRD), and infrared (IR) spectrum were used to confirmed the iron rust conversion performance by the reaction of phytic acid and rust. electrochemical impedance spectroscopy (EIS), polarization curve, and salt spray test were used to evaluate the corrosion resistance of low surface treatment coatings. Results indicated most of the rust were dissolved and transformed with the reaction of phytic acid and rust on the rusty carbon steel; graphene could effectively improve the compactness and protective performance of the epoxy surface tolerant coating.

SURFACE PASSIVE FILM CHARACTERISTIC OF Q235 CARBON STEEL IN PURE MOLYBDATE SOLUTION

2019 ◽  
Vol 27 (05) ◽  
pp. 1950179 ◽  
Author(s):  
PEI ZHANG ◽  
YIJIANG CHEN ◽  
HUIJU HUANG ◽  
YONG ZHOU ◽  
FUAN YAN ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Passive Film ◽  
Electrochemical Impedance ◽  
X Ray ◽  
Dense Microstructure ◽  
Schottky Plot ◽  
Q235 Carbon Steel ◽  
Film Characteristics ◽  
Scanning Electron ◽  
Defect Microstructure

In pure Na2MoO4 solutions with different concentrations of MoO[Formula: see text] (0.01, 0.04, 0.06, 0.08 and 0.10 mmol/L), a passive film was formed on the surface of Q235 carbon steel spontaneously, and the influences of MoO[Formula: see text] concentrations on the passive film characteristics were investigated. The electrochemical and microstructural techniques of electrochemical impedance spectroscopy (EIS), Mott–Schottky plot (MSP), scanning electron microscope (SEM) and X-ray photoelectron spectroscope (XPS) were applied to characterize the passive film characteristics, including resistance, defect, microstructure and composition. The resistance and defect of passive film respectively increased and decreased with increased MoO[Formula: see text] concentration up to 0.08[Formula: see text]mmol/L, which was the critical MoO[Formula: see text] concentration of complete passivation for the Q235 surface. The passive film formed in the 0.08[Formula: see text]mmol/L Na2MoO4 solution showed a dense microstructure and was composed of Fe2(MoO[Formula: see text] mainly. Further, in this work, the relation between characteristic and anti-corrosion of passive film was also discussed.

Sign in / Sign up

Export Citation Format

Share Document