scholarly journals Study on the corrosion behavior of steel Q315NS heat-affected zone in a HCl solution using electrochemical noise

RSC Advances ◽  
2018 ◽  
Vol 8 (1) ◽  
pp. 454-463 ◽  
Author(s):  
S. Q. Zhang ◽  
H. Y. Zhao ◽  
F. Y. Shu ◽  
G. D. Wang ◽  
B. Liu ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Heat Affected Zone ◽  
Electrochemical Noise ◽  
Uniform Corrosion ◽  
Metastable Pitting ◽  
Hcl Solution

Uniform corrosion occurred on CGHAZ of Q315NS owing to coarse GB while pitting occurs on BM after metastable pitting.

scholarly journals Electrochemical Noise Measurements of Advanced High-Strength Steels in Different Solutions

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1232 ◽  
Author(s):  
Marvin Montoya-Rangel ◽  
Nelson Garza-Montes de Oca ◽  
Citlalli Gaona-Tiburcio ◽  
Rafael Colás ◽  
José Cabral-Miramontes ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Electrochemical Noise ◽  
High Strength Steels ◽  
High Strength ◽  
Polynomial Method ◽  
Dual Phase ◽  
Uniform Corrosion ◽  
Advanced High Strength Steels ◽  
Trend Data ◽  
Noise Measurements

Advanced high-strength steels (AHSS), are commonly used in the manufacture of car bodies, as well as in front and rear rails, and safety posts. These components can be exposed to corrosive environments for instance, in countries where de-icing salts are used. In this work, the corrosion behavior of four AHSS steels with dual-phase [ferrite-martensite (DP) and ferrite-bainite (FB)] steels were studied by means of electrochemical noise (EN) measurements according to the ASTM G199-09 standard in NaCl, CaCl2 and MgCl2 aqueous solutions at room temperature. The direct current (DC) trend data from EN were removed by a polynomial method of statistical and spectral analysis. According to the noise resistance (Rn) values obtained for the DP and FB dual-phase steels, both the martensite/bainite content and morphology of the phase constituents have an important effect on the corrosion behavior of these steels. The L.I. (localization index) (0.00054 to 0.15431), skewness (−6.18 to 7.35) and kurtosis (high values 37.15, 74.84 and 106.52) were calculated. In general, the results indicated that the main corrosion process is related to uniform corrosion. Corrosion behavior of AHSS steels exposed in NaCl solution could be related to the morphology of the phase constituents exposed in NaCl, CaCl2 and MgCl2 solutions.

scholarly journals Corrosion of Mechanically Alloyed Nanostructured FeAl Intermetallic Powders

2012 ◽  
Vol 2012 ◽  
pp. 1-9 ◽  
Author(s):  
A. Torres-Islas ◽  
C. Carachure ◽  
S. Serna ◽  
B. Campillo ◽  
G. Rosas
Keyword(s):  
Corrosion Behavior ◽  
Electrochemical Impedance ◽  
Electrochemical Techniques ◽  
Corrosion Current ◽  
Test Time ◽  
Uniform Corrosion ◽  
Mechanically Alloyed ◽  
Solution Ph ◽  
Surface Corrosion ◽  
Electrochemical Testing

The corrosion behavior of the Fe40Al60nanostructured intermetallic composition was studied using electrochemical impedance spectroscopy (EIS) and linear polarization resistance (LPR) techniques with an innovative electrochemical cell arrangement. The Fe40Al60(% at) intermetallic composition was obtained by mechanical alloying using elemental powders of Fe (99.99%) and Al (99.99%). All electrochemical testing was carried out in Fe40Al60particles that were in water with different pH values. Temperature and test time were also varied. The experimental data was analyzed as an indicator of the monitoring of the particle corrosion current densityicorr. Different oxide types that were formed at surface particle were found. These oxides promote two types of surface corrosion mechanisms: (i) diffusion and (ii) charge transfer mechanisms, which are a function oficorrbehavior of the solution, pH, temperature, and test time. The intermetallic was characterized before and after each test by transmission electron microscopy. Furthermore, the results show that at the surface particles uniform corrosion takes place. These results confirm that it is possible to sense the nanoparticle corrosion behavior by EIS and LPR conventional electrochemical techniques.

scholarly journals Corrosion Behavior of Al in Ethanol–Gasoline Blends

Energies ◽  
2020 ◽  
Vol 13 (21) ◽  
pp. 5544
Author(s):  
Alfredo Brito-Franco ◽  
Jorge Uruchurtu ◽  
Isai Rosales-Cadena ◽  
Roy Lopez-Sesenes ◽  
Sergio Alonso Serna-Barquera ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Sugar Cane ◽  
Electrochemical Noise ◽  
Electrochemical Impedance ◽  
Pure Aluminum ◽  
Electrochemical Techniques ◽  
Intermediate Compound ◽  
Corrosion Process ◽  
Corrosion Rates ◽  
Adsorption Desorption

The corrosion behavior of pure aluminum (Al) in 20 v/v% ethanol–gasoline blends has been studied using electrochemical techniques. Ethanol was obtained from different fruits including sugar cane, oranges, apples, or mangos, whereas other techniques included lineal polarization resistance, electrochemical noise, and electrochemical impedance spectroscopy for 90 days. Results have shown that corrosion rates for Al in all the blends were higher than that obtained in gasoline. In addition, the highest corrosion rate was obtained in the blend containing ethanol obtained from sugar cane. The corrosion process was under charge transfer control in all blends; however, for some exposure times, it was under the adsorption/desorption control of an intermediate compound. Al was susceptible to a localized, plotting type of corrosion in all blends, but they were bigger in size and in number in the blend containing ethanol obtained from sugar cane.

ChemInform Abstract: The Corrosion Behavior of Sputter-Deposited Amorphous Cr-Nb and Cr-Ta Alloys in 12 M HCl Solution.

ChemInform ◽  
2010 ◽  
Vol 25 (9) ◽  
pp. no-no
Author(s):  
J. H. KIM ◽  
E. AKIYAMA ◽  
H. HABAZAKI ◽  
A. KAWASHIMA ◽  
K. ASAMI ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Sputter Deposited ◽  
Hcl Solution

scholarly journals Effect of CO2/H2S and Applied Stress on Corrosion Behavior of 15Cr Tubing in Oil Field Environment

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 409
Author(s):  
Xuehui Zhao ◽  
Wei Huang ◽  
Guoping Li ◽  
Yaorong Feng ◽  
Jianxun Zhang
Keyword(s):  
Stainless Steel ◽  
Partial Pressure ◽  
Stress Corrosion ◽  
Applied Stress ◽  
Corrosion Behavior ◽  
Stress Corrosion Cracking ◽  
Corrosion Cracking ◽  
Oil Field ◽  
Uniform Corrosion ◽  
Field Environment

The corrosion behavior of a 15Cr-6Ni-2Mo martensitic stainless steel (15Cr stainless steel) in a CO2/H2S environment was investigated by conducting high-temperature/high-pressure immersion tests combined with scanning electron microscopy and metallographic microscopy. The presence of H2S decreased the corrosion resistance of the 15Cr tubing steel. The critical H2S partial pressure (PH2S) for stress corrosion cracking in the 15Cr tubing steel in the simulated oil field environment with a CO2 partial pressure of 4 MPa and an applied stress of 80% σs was identified. The 15Cr tubing steel mainly suffered uniform corrosion with no pitting and cracking when the PH2S was below 0.5 MPa. When the PH2S increased to 1 MPa and the test temperature was 150 °C, the pitting and cracking sensitivity increased. The stress corrosion cracking at a higher PH2S is attributed to the sulfide-induced brittle fracture.

Application of Electrochemical Noise Analysis to Study the Corrosion Behavior of Aluminum Composites

1995 ◽  
Vol 142 (2) ◽  
pp. 405-410 ◽  
Author(s):  
C. Monticelli ◽  
F. Zucchi ◽  
F. Bonollo ◽  
G. Brunoro ◽  
A. Frignani ◽  
...  
Keyword(s):  
Corrosion Behavior ◽  
Electrochemical Noise ◽  
Noise Analysis ◽  
Aluminum Composites
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