scholarly journals Effect of Curing Temperature and Phosphoric Acid on Corrosion Resistance of Mannich-modified Phenolic Resin on Galvanized Steel Surface

2014 ◽  
Vol 63 (1) ◽  
pp. 17-24 ◽  
Author(s):  
Ryosuke Sako ◽  
Jun'ichi Sakai
Keyword(s):  
Corrosion Resistance ◽  
Phosphoric Acid ◽  
Steel Surface ◽  
Phenolic Resin ◽  
Curing Temperature ◽  
Galvanized Steel

Influence of GPTMS Precursor Concentration as Pretreatment of Galvanized Steel

2018 ◽  
Vol 930 ◽  
pp. 428-433
Author(s):  
Henrique Carvalho de Oliveira ◽  
Oscar de Almeida Neuwald ◽  
Lilian Vanessa Rossa Beltrami ◽  
Gunther Johannes Lewczuk Gerhardt ◽  
Sandra Raquel Kunst
Keyword(s):  
Corrosion Resistance ◽  
Steel Surface ◽  
Chemical Conversion ◽  
Dip Coating ◽  
Precursor Concentration ◽  
Galvanized Steel ◽  
Electrochemical Characteristics ◽  
Corrosion Resistance Property ◽  
Coating Method ◽  
Dip Coating Method

This work aims to evaluate the influence of the alkoxy precursor concentration on the morphological and electrochemical characteristics of the chemical conversion layer formed on a galvanized steel surface. Different films were obtained by the dip coating method varying precursor concentrations in 2, 5 and 10%. According to the SEM and EIS results the corrosion resistance property increases for higher GPTMS precursor concentrations.

Energy storage and surface protection properties of dianiline co-polymers

RSC Advances ◽  
2015 ◽  
Vol 5 (129) ◽  
pp. 106523-106535 ◽  
Author(s):  
Apparao Thota ◽  
Ravi Arukula ◽  
Ramanuj Narayan ◽  
Chepuri R. K. Rao ◽  
K. V. S. N. Raju
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Energy Storage ◽  
Phosphoric Acid ◽  
Steel Surface ◽  
Substituted Anilines ◽  
High Corrosion Resistance ◽  
Surface Protection ◽  
High Corrosion

Phosphoric acid doped co-polyanilines of substituted anilines and dianiline give conductivities up to 9.25 × 10−2 S cm−1, specific capacitances on a stainless steel capacitor of 110–176.76 F g−1 at 0.5 A g−1 and have high corrosion resistance on a steel surface.

Characteristics of Phosphoric Acid Sealed Ceramic Oxide Coatings

1996 ◽  
Author(s):  
E. Kumpulainen ◽  
M. Vippola ◽  
P. Vuoristo ◽  
P. Sorsa ◽  
T. Mäntylä
Keyword(s):  
Corrosion Resistance ◽  
Phosphoric Acid ◽  
Zirconium Oxide ◽  
Ceramic Coatings ◽  
Atmospheric Plasma ◽  
Curing Temperature ◽  
Oxide Coatings ◽  
Heat Treated ◽  
Plasma Sprayed ◽  
Hardness Values

Abstract Plasma sprayed ceramic coatings usually have relatively high open porosity in order to provide a good corrosion protection. By using sealants the porosity values can be reduced. In this study atmospheric plasma sprayed (APS) aluminium oxide, chromium oxide and zirconium oxide coatings were sealed by a phosphoric acid treatment. After impregnation the coatings were heat treated at a curing temperature of 400°C. Phosphoric acid was found to react with the coating material during the heat treatment. Wear resistance was evaluated by rubber wheel abrasion tests and corrosion resistance by electrochemical potentio-dynamic polarization tests. Hardness values were also measured. Corrosion resistance and hardness values of sealed coatings were remarkable better in comparison to the unsealed coatings. Rubber wheel abrasion resistances of the sealed coatings were equal to those of Al2O3, ZTA, SiC and Si3N4 sintered ceramics.

The Effect of Composition and Microstructure on Corrosion Behavior in SST of Zn-Al-Mg Galvanized Steel Sheet

2013 ◽  
Vol 442 ◽  
pp. 64-69
Author(s):  
Feng Li ◽  
Jia Shun Lv ◽  
Hong Gang Yang ◽  
Fang Zhou ◽  
Leng Zhang ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Corrosion Behavior ◽  
Steel Sheet ◽  
Alloy Composition ◽  
Element Distribution ◽  
Galvanized Steel ◽  
Good Corrosion Resistance ◽  
Excellent Corrosion Resistance

Z11A3M, Z6A3M, Z1.6A1.6M, Z1A1M and Z1M coating samples were prepared in HDPS by traditional continuous hot dipping method. The microstructure, element distribution and phase was analyzed by SEM, EPMA and XRD. The corrosion resistance was checked in SST. The result was, MgZn2 and eutectic could be found in all ZAM coating. The ZAM coatings showed excellent corrosion resistance in SST than GI. The corrosion resistance was 4.1 to 11 times of GI. There was no strong relativity between alloy composition and corrosion resistance due to Mg enrichment on the surface of coating. Edge-unsealed ZAM samples showed good corrosion resistance than edge-sealed sample.

scholarly journals Superhydrophobic Film on Hot-Dip Galvanized Steel with Corrosion Resistance and Self-Cleaning Properties

Metals ◽  
2018 ◽  
Vol 8 (9) ◽  
pp. 687 ◽  
Author(s):  
Chongchong Li ◽  
Ruina Ma ◽  
An Du ◽  
Yongzhe Fan ◽  
Xue Zhao ◽  
...  
Keyword(s):  
Corrosion Resistance ◽  
Photoelectron Spectroscopy ◽  
Copper Nitrate ◽  
Galvanized Steel ◽  
Electrochemical Technique ◽  
Etching Time ◽  
Galvanic Replacement ◽  
Water Contact ◽  
X Ray ◽  
Self Cleaning

Super-hydrophobic film with hierarchical micro/nano structures was prepared by galvanic replacement reaction process on the surface of galvanized steel. The effects of the etching time and copper nitrate concentration on the wetting property of the as-prepared surfaces were studied. Scanning electron microscopy/energy dispersive spectroscopy (SEM/EDS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and electrochemical technique were employed to characterize the surface morphology, chemical composition, and corrosion resistance. The stability and self-cleaning property of the as-fabricated super-hydrophobic film were also evaluated. The super-hydrophobic film can be obtained within 3 min and possesses a water contact angle of 164.3° ± 2°. Potentiodynamic polarization measurements indicated that the super-hydrophobic film greatly improved the corrosion resistance of the galvanized steel in 3.5 wt % NaCl aqueous solution. The highest inhibition efficiency was estimated to be 96.6%. The obtained super-hydrophobic film showed good stability and self-cleaning property.

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