The Oxygen Concentration Cell as a Factor in the Localized Corrosion of Metals

1956 ◽  
Vol 103 (8) ◽  
pp. 467 ◽  
Author(s):  
Wilson Lynes
Keyword(s):  
Oxygen Concentration ◽  
Localized Corrosion ◽  
Concentration Cell

scholarly journals Title Synergistic Effect of Al2O3 Inclusion and Pearlite on the Localized Corrosion Evolution Process of Carbon Steel in Marine Environment

Materials ◽  
2018 ◽  
Vol 11 (11) ◽  
pp. 2277 ◽  
Author(s):  
Chao Liu ◽  
Xuequn Cheng ◽  
Zeyu Dai ◽  
Ryan Liu ◽  
Ziyu Li ◽  
...  
Keyword(s):  
Carbon Steel ◽  
Synergistic Effect ◽  
Oxygen Concentration ◽  
Marine Environment ◽  
Localized Corrosion ◽  
Kelvin Probe ◽  
Concentration Cell ◽  
Corrosion Morphology ◽  
Xisha Island ◽  
Al2o3 Inclusion

The initiation and evolution of the localized corrosion in carbon steel were investigated in a simulated marine environment of Xisha Island in the South China Sea. In the initial stage, localized corrosion occurred in the form of corrosion spot. The localized corrosion morphology and electrochemical information during corrosion process were tracked by field emission scanning electron microscopy energy dispersive spectrometry (FE-SEM-EDS), scanning vibrating electrode technique (SVET) and scanning Kelvin probe force microscopy (SKPFM). Localized corrosion was induced by the microcrevices around Al2O3 inclusions. The occluded cells and oxygen concentration cell formed in the pits could accelerate the localized corrosion. Pearlite accelerated the dissolution of the inside and surrounding ferrite via the galvanic effect between Fe3C and ferrite. Overall, the localized corrosion was initiated and evaluated under a synergistic effect of crevice corrosion, occluded cells, oxygen concentration cell and the galvanic couple between FeC3 and ferrite.

Effects of Salt Corrosion on the Adhesion of Brass Plated Steel Cord to Rubber

1986 ◽  
Vol 59 (1) ◽  
pp. 1-15 ◽  
Author(s):  
Yasuhiro Ishikawa ◽  
Shinji Kawakami
Keyword(s):  
Oxygen Concentration ◽  
Corrosion Test ◽  
Nacl Solution ◽  
Concentration Cell ◽  
Open Type ◽  
Salt Corrosion ◽  
Steel Cord ◽  
Brass Plating ◽  
Electrochemical Oxygen

Abstract Adhesion loss caused by salt corrosion is proposed to occur by the following process: 1) During a salt corrosion test, the NaCl solution rises in the cavity located at the steel-cord center. 2) An electrochemical oxygen concentration cell is formed. 3) OH− is produced by the reduction of oxygen. 4) An increase of the NaOH concentration causes the reverse of ion tendency between brass and steel. 5) Dezincification and dissolution of brass take place in the brass plating. The same process also occurs in the corrosion of a bare brass plated steel cord immersed in NaCl solution. Compounds containing cobalt stearate and a compound free from cobalt show adhesion deterioration by the process described above. Many other cobalt salts suppress the corrosion of brass in NaCl solution. At the same time, the underlying steel changes to become ignoble compared with brass, leading to the production of a large amount of rust. In view of the above considerations, it is desirable to remove the cavity located at the steel-cord center in order to suppress the steel-cord corrosion. Use of an open type of steel cord is useful in this respect.

Voltage Step Characteristics of Oxygen Concentration Cell Sensors for Nonequilibrium Gas Mixtures

1988 ◽  
Vol 135 (7) ◽  
pp. 1686-1691 ◽  
Author(s):  
Keiichi Saji ◽  
Haruyoshi Kondo ◽  
Takashi Takeuchi ◽  
Isemi Igarashi
Keyword(s):  
Oxygen Concentration ◽  
Gas Mixtures ◽  
Voltage Step ◽  
Concentration Cell ◽  
Nonequilibrium Gas
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