Corrosion resistance of anodic coatings studied by scanning microscopy and electrochemical methods

The undertaken research which is described in this paper aims at the corrosion behaviour of composite coatings in nickel matrix using as dispersed phase technical alumina with dimensions of 5 μm and their characterization from a microstructural point of view. The corrosion resistance in the saline fog of the coatings is influenced by the microstructure, the stresses developed in the layer and the roughness.

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Corrosion processes in cooling towers

Budownictwo i Architektura ◽

10.35784/bud-arch.2036 ◽

2013 ◽

Vol 12 (3) ◽

pp. 231-238

Author(s):

Teresa Szymura ◽

Wojciech Adamczyk

Keyword(s):

Corrosion Resistance ◽

Corrosion Rate ◽

Structural Steel ◽

Ammonium Sulfate ◽

Ammonium Chloride ◽

Cooling Tower ◽

Cooling Water ◽

Corrosion Testing ◽

Electrochemical Methods ◽

Cooling Towers

Corrosion testing was performed on structural steel of a cooling tower in the environment of cooling water containing ammonium sulfates and ammonium chloride. The test were performed using gravimetric and electrochemical methods with the application of a potentiostat. The analyses clearly showed that the corrosion rate is higher in solutions that contain ammonium sulfate and that the S235JRG2 steel exhibits higher corrosion resistance in this environment.

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Effect of Rare Earth on the Inclusions and Pitting Resistance of Ferrite Stainless Steel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.531.47 ◽

2012 ◽

Vol 531 ◽

pp. 47-50

Author(s):

Xiao Liu ◽

Jian She Li

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

Rare Earth ◽

Pitting Corrosion ◽

Stainless Steels ◽

Anodic Polarization ◽

Electrochemical Methods ◽

Polarization Curves ◽

Metallographic Examination ◽

Pitting Corrosion Resistance

The anodic polarization curves of 430 ferrite stainless steels with various RE contents in 3.5% NaCl neutral solutions have been measured by electrochemical methods. The effect of RE on pitting corrosion resistance of 430 ferrite stainless steels has been studied by the metallographic examination. The results show that sulfide and other irregular inclusions are modified to round or oval-shaped RE2O2S and RES after adding RE to 430 ferrite stainless steesl. RE makes sulfide, and other irregular inclusions change to dispersed round or oval-shaped RE inclusions, effectively inhibits the occurrence of pitting corrosion, thereby enhancing the corrosion resistance of 430 ferrite stainless steels.

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Effect of Ce on the Inclusions and Pitting Resistance of 2Cr13 Stainless Steel

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.602-604.376 ◽

2012 ◽

Vol 602-604 ◽

pp. 376-379 ◽

Cited By ~ 1

Author(s):

Xiao Liu ◽

Long Mei Wang

Keyword(s):

Stainless Steel ◽

Corrosion Resistance ◽

Pitting Corrosion ◽

Anodic Polarization ◽

Electrochemical Methods ◽

Polarization Curves ◽

Metallographic Examination ◽

Pitting Corrosion Resistance

The anodic polarization curves of 2Cr13 stainless steel with various RE contents in 3.5% NaCl neutral solutions have been measured by electrochemical methods. The effect of Ce on pitting corrosion resistance of 2Cr13 stainless steel has been studied by the metallographic examination. The results show that sulfide and other irregular inclusions are modified to round or oval-shaped Ce2O2S and CeS after adding Ce to 2Cr13 stainless steel.Ce makes sulfide, and other irregular inclusions change to dispersed round or oval-shaped Ce inclusions, effectively inhibits the occurrence of pitting corrosion, thereby enhancing the corrosion resistance of 2Cr13 stainless steel.

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