Fractographic Study of Destruction of Composite Coatings After Bending Tests

Abstract Epoxy composites were modified by reactive polybutadiene, and their resistance to T-bend and liquid permeation was evaluated to develop flexible epoxy composite coatings with good resistance to corrosive media. The composites’ resistance to bending on galvanic sheets was improved with the addition of up to around 15 wt.% amino liquid polybutadiene (ALPB) as reflected by the cross-section images after bending tests and bending times at break. The initial impedance increased with the addition of up to 15 wt.% ALPB in the composites, whereas the resistance reduced in a much slow rate with immersion time for the sample containing ALPB at around 10 wt.%. This result suggested that their resisting ability depended on the amount and dispersion of ALPB. The Rc and Cc parameters from the electrochemical impedance spectroscopy measurements revealed that the improvement in resistance to electrolyte resulted from the compactness increment at certain range of ALPB additions, which was also supported by their water uptake trends. Moreover, the addition of ALPB above 20% resulted in severe aggregations and phase separations. The resulting reduced compactness reflects the fact that the excessive reactive rubber addition leads to the negative effects on their resisting ability upon both T-bend and liquid permeation.

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Electrodeposition and Characterization of Cr-Fe-ZrO2 Composite Coating from Trivalent Chromium Chloride Electrolyte

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.239-242.3056 ◽

2011 ◽

Vol 239-242 ◽

pp. 3056-3061 ◽

Cited By ~ 3

Author(s):

Xiang Zhu He ◽

Xin Li Zhou ◽

Lin Yuan Huang

Keyword(s):

Composite Coating ◽

Composite Coatings ◽

Trivalent Chromium ◽

Complexing Agent ◽

Bending Tests ◽

Chromium Chloride ◽

Chloride Electrolyte ◽

Appearance Quality ◽

Nano Size

Cr-Fe-ZrO2composite coatings were electrodeposited in trivalent chromium chloride electrolyte containing glycine as complexing agent. The effects of electrodeposition parameters such as current density and electroplating time on appearance, surface morphology and composition of the Cr-Fe-ZrO2composite coatings were investigated mainly. The obtained Cr-Fe-ZrO2composite coatings were characterized by means of scanning electron microscope (SEM) and energy disperse spectroscopy (EDS) techniques; the appearance quality was evaluated by range estimation; and the bonding force was analyzed by bending tests. The SEM results showed that the nano-size ZrO2powder were fairly distributed through out in the composite coating, and the composite coating contained only few fine cracks. The EDS results indicated that the composite coating contained chromium, iron, zirconium, oxygen, carbon and chlorine. The deposited coating was glossy and the results of bending tests showed that the bonding between the composite coating and the substrate was good

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Fractographic analysis of the destruction composite coatings after bending tests

Izvestiya vysshikh uchebnykh zavedenii. Fizika ◽

10.17223/00213411/62/9/15 ◽

2019 ◽

pp. 15-19

Author(s):

T.A. Krylova ◽

◽

Y.A. Chumakov ◽

E.V. Domarov ◽

A.I. Korchagin ◽

...

Keyword(s):

Composite Coatings ◽

Fractographic Analysis ◽

Bending Tests

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Microwave Absorbing Properties of Carbon Fibers Modified with BN/SiC Composite Coatings

Journal of Inorganic Materials ◽

10.15541/jim20140014 ◽

2014 ◽

Vol 29 (10) ◽

pp. 1093 ◽

Cited By ~ 7

Author(s):

ZHOU Wei ◽

XIAO Peng ◽

LI Yang ◽

LUO Heng ◽

HONG Wen

Keyword(s):

Carbon Fibers ◽

Composite Coatings ◽

Microwave Absorbing Properties ◽

Microwave Absorbing

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Full-Scale Torsion, Shear, and Bending Tests of Prestressed I-Girders

PCI Journal ◽

10.15554/pcij.03011978.22.41 ◽

1978 ◽

Vol 23 (2) ◽

pp. 22-41 ◽

Cited By ~ 1

Author(s):

Alan H. Mattock ◽

A. N. Wyss

Keyword(s):

Full Scale ◽

Bending Tests

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Laser cladding Ni-base composite coatings reinforced by in-situ synthesized multiple carbide particles

10.2351/1.5061262 ◽

2008 ◽

Author(s):

Ruiquan Kang ◽

Mingxing Ma ◽

Wenjin Liu ◽

Minlin Zhong ◽

Yide Kan ◽

...

Keyword(s):

Laser Cladding ◽

Composite Coatings ◽

Base Composite ◽

Carbide Particles

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Determination of Concrete Cube Strength from Used Samples / Určení Krychelné Pevnosti Betonu U Použitých Zkušebních Trámců

Transactions of the VŠB - Technical University of Ostrava Civil Engineering Series ◽

10.2478/v10160-012-0033-3 ◽

2012 ◽

Vol 12 (2) ◽

pp. 186-194 ◽

Cited By ~ 2

Author(s):

Oldřich Sucharda ◽

David Mikolášek ◽

Jiří Brožovský

Keyword(s):

Compressive Strength ◽

Concrete Beams ◽

Linear Analysis ◽

Bending Tests ◽

Cube Strength ◽

Non Linear ◽

Compressive Strength Of Concrete ◽

Concrete Cube

Abstract This paper deals with the determination of compressive strength of concrete. Cubes, cylinders and re-used test beams were tested. The concrete beams were first subjected to three-point or fourpoint bending tests and then used for determination of the compressive strength of concrete. Some concrete beams were reinforced, while others had no reinforcement. Accuracy of the experiments and calculations was verified in a non-linear analysis.

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