Evaluation of the Anticorrosion and Adhesion Properties of an Epoxy/Polyamide Coating Applied on the Steel Surface Treated by an Ambient Temperature Zinc Phosphate Coating Containing Ni2+Cations

CORROSION ◽  
10.5006/1344 ◽  
2015 ◽  
Vol 71 (1) ◽  
pp. 4-13 ◽  
Author(s):  
E. Matin ◽  
M.M. Attar ◽  
B. Ramezanzadeh
Keyword(s):  
Ambient Temperature ◽  
Steel Surface ◽  
Zinc Phosphate ◽  
Phosphate Coating ◽  
Adhesion Properties

Corrosion performance and morphological analysis of activated zinc phosphate coating formed on steel surface

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Khalid Abdalla ◽  
Hussain Zuhailawati
Keyword(s):  
Steel Surface ◽  
Zinc Phosphate ◽  
Electrochemical Impedance ◽  
Morphological Evolution ◽  
Copper Acetate ◽  
Acetate Solution ◽  
Phosphate Coating ◽  
Immersion Method ◽  
Content Type ◽  
Pretreatment Solution

Purpose The purpose of this paper is to study the effect of different concentrations of pretreatment solution of copper acetate (1, 5 and 10 g/L) on the deposition, growth and protection ability of zinc phosphate coating. Design/methodology/approach Zinc phosphate coatings were deposited on steel surface by immersion method. Scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) were used to study the morphological evolution and chemical analysis of formed coatings. The electrochemical performance of the coatings was evaluated via potentiodynamic polarization curves, electrochemical impedance spectroscopy (EIS) and immersion test in an aerated 3.5% NaCl solution. Findings The results showed that the activation treatment accelerated the deposition of the phosphate coating and improved its surface coverage. A higher phosphate coating weight (7.35 g/m2) and more compact structure was obtained with pretreatment solution of 1 g/L copper acetate. Electrochemical results revealed that the protection ability of the phosphated substrates was markedly enhanced after the pretreatment, and the best corrosion protection was obtained with a concentration of 1 g/L copper acetate solution. The corrosion current density of phosphated substrate was reduced by 64.9% after activation treatment with 1 g/L copper acetate solution. Originality/value In this investigation, dense, stable and compact zinc phosphate layers with improved corrosion resistance were formed on a carbon steel surface after activation pretreatment with copper acetate solution prior to a phosphating step.

Treatment of rinse water from zinc phosphate coating by batch and continuous electrocoagulation processes

2010 ◽  
Vol 173 (1-3) ◽  
pp. 326-334 ◽  
Author(s):  
M. Kobya ◽  
E. Demirbas ◽  
A. Dedeli ◽  
M.T. Sensoy
Keyword(s):  
Zinc Phosphate ◽  
Phosphate Coating ◽  
Rinse Water

Scorch Control of Carboxylic Elastomers

1973 ◽  
Vol 46 (1) ◽  
pp. 78-95 ◽  
Author(s):  
V. L. Hallenbeck
Keyword(s):  
Zinc Oxide ◽  
Physical Properties ◽  
Shelf Life ◽  
Zinc Sulfide ◽  
Zinc Phosphate ◽  
Carboxyl Groups ◽  
Carboxyl Group ◽  
Phosphate Coating ◽  
Ionic Bond ◽  
Cure Temperature

Abstract Carboxylic elastomers can be cured by standard compounding recipes utilizing sulfur and zinc oxide. The zinc oxide, besides aiding the sulfur cure, also gives a secondary cure through an ionic bond with the carboxyl groups. However, because of the affinity of the zinc oxide for the carboxyl group, the stocks tend to have an excessive scorch and a short shelf life. To prevent this excessive scorch the zinc oxide must be isolated from the carboxyl group until the desired cure temperature is reached. Three materials may be used to isolate the zinc oxide : 1) zinc sulfide coated zinc oxide, 2) zinc phosphate coated zinc oxide and 3) metallic alkoxide combined with the zinc oxide. The use of any of these gives scorch control without affecting final physical properties. The amount of zinc sulfide coating, zinc phosphate coating, and metallic alkoxide varies with the type of carboxylic elastomer.

scholarly journals Fundametal Characteristics of Zinc Phosphate Coating

1980 ◽  
Vol 66 (7) ◽  
pp. 924-934 ◽  
Author(s):  
Ryuji KOJIMA ◽  
Hiroshi OKITA ◽  
Yasunobu MATSUSHIMA
Keyword(s):  
Zinc Phosphate ◽  
Phosphate Coating

Self-healing polymers with PEG oligomer side chains based on multiple H-bonding and adhesion properties

2015 ◽  
Vol 6 (28) ◽  
pp. 5086-5092 ◽  
Author(s):  
Dandan Zhu ◽  
Qiang Ye ◽  
Xuemin Lu ◽  
Qinghua Lu
Keyword(s):  
Ambient Temperature ◽  
High Surface ◽  
Side Chain ◽  
Side Chains ◽  
Self Healing ◽  
Adhesion Properties ◽  
Surface Energies

Copolymers with a PEG oligomer side chain present high surface energies and adhesion properties; they also can quickly self-heal the crack interfaces spontaneously at ambient temperature.

Sign in / Sign up

Export Citation Format

Share Document