Influence of Surface Treatment on Steel Adhesive Joints Strength—Varnish Coats

The purpose of the paper is to determine the impact of surface treatment on the strength of adhesive joints, made from various steel sheets. Two variants of the surface treatment steel adherends were used: without the varnish coat and with the varnish coat, using three polymer-based varnishes (a simple, a hybrid, and a gel). Two types of the adhesives were used to prepare the adhesive joints: a single-component cyanoacrylate adhesive and a two-component epoxy adhesive. A strength test of the adhesive joints (EN DIN 1465 standard), a coating adhesion test (ASTM D3359-B standard), and surface topography, as well as surface roughness, parameters (PN-EN ISO 11562, PN-EN ISO 4287, and PN-EN ISO 25178 standards) were used. Based on the strength tests, it was observed that the adhesive joints, with the hybrid varnish onto the adherend’s surface, achieved markedly lower shear strength. The best results, in terms of the adhesive joint strength, made using the cyanoacrylate adhesive were achieved for the joints where the adherends were coated with a simple varnish, while in the joints made using the epoxy adhesive, the highest shear strength was achieved by the joints of sheets whose surfaces were coated with the gel varnish.

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Mechanical Properties and Leak-Tightness of Polymeric Pipe Adhesive Joints

Applied Mechanics ◽

10.3390/applmech3010004 ◽

2022 ◽

Vol 3 (1) ◽

pp. 64-77

Author(s):

Anna Rudawska ◽

Magd Abdel Wahab ◽

Miroslav Müller ◽

Dana Stančeková

Keyword(s):

Mechanical Properties ◽

Polyvinyl Chloride ◽

Epoxy Adhesive ◽

Adhesive Joints ◽

Cyanoacrylate Adhesive ◽

Strength Tests ◽

Two Component ◽

Leak Tightness

This paper presents issues related to the determination of the selected mechanical properties of adhesive joints made of polymeric pipes and the evaluation of the leak-tightness of the adhesive joints. The article attempts to demonstrate that the type of adhesive may affect the quality of adhesive joints in terms of both tightness and strength of joints. Five types of the polymer pipes differing in a polypropylene and a polyvinyl chloride, diameter and a wall thickness were used in the experiments. Two types of the adhesives were used to make the adhesive joints: Loctite 3430 A&B Hysol, a two-component epoxy adhesive, and Loctite 406, a one-component cyanoacrylate adhesive. Based on the leak-tightness tests results, it was possible to determine the quality of their adhesive joints without damaging the samples, while their tensile strength was determined through the strength tests. The tests performed allowed for the conclusion that the use of the polyvinyl chloride pipes and Loctite 406 one-component adhesive is recommended for this type of adhesive joints.

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Mechanical Properties of Selected Epoxy Adhesive and Adhesive Joints of Steel Sheets

Applied Mechanics ◽

10.3390/applmech2010007 ◽

2021 ◽

Vol 2 (1) ◽

pp. 108-126

Author(s):

Anna Rudawska

Keyword(s):

Mechanical Properties ◽

Epoxy Resin ◽

Experimental Tests ◽

Epoxy Adhesive ◽

Adhesive Joints ◽

Stoichiometric Ratio ◽

Curing Agent ◽

Steel Sheets ◽

Epoxy Adhesives ◽

Strength Tests

The article presents the issues of the mechanical properties of epoxy adhesives and the adhesive joints strength of steel sheets which were made using the epoxy adhesives. The aim of the paper is to study the mechanical properties of epoxy adhesive of different epoxy resin/curing agent ratios (within and above the recommended stoichiometric ratio) and their effect on mechanical properties of adhesive joints of steel sheets. In experimental tests three types of epoxy adhesives, containing a low molecular weight epoxy resin based on bisphenol A and polyamide curing agent, were used. A single-lap adhesive joint type of stainless-steel sheets was also applied. Two types of strength test were used: the compressive strength tests (DIN EN 196-1) for epoxy adhesive samples and the shear strength tests (DIN EN 1465) for adhesive joints. Both the analysis of the strength results of the samples of epoxy adhesive and adhesive joints as well as the failure analysis was carried out. On the basis of the results of strength tests it can be stated that the greatest deformation occurred for the samples of epoxy adhesive containing the modified epoxy resin (epoxy number—0.40) and the polyamide curing agent, and the smallest for the samples of epoxy adhesive containing the basic epoxy resin (epoxy number—0.49–0.52) and the polyamide curing agent. The epoxy adhesives with a smaller amount of curing agent were characterized by higher strength. This applies to all analyzed epoxy resins. The same dependences were obtained for the strength of adhesive joints of steel sheets made of the analyzed epoxy adhesive.

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The impact resistance of CTBN- modified epoxy adhesive joints

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:19948119 ◽

1994 ◽

Vol 04 (C8) ◽

pp. C8-771-C8-776 ◽

Cited By ~ 1

Author(s):

J. L. Lataillade ◽

D. Grapotte ◽

F. Cayssials

Keyword(s):

Impact Resistance ◽

Epoxy Adhesive ◽

Adhesive Joints ◽

The Impact ◽

Modified Epoxy

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Comparative Analysis of Shear Strength of Single-Lap Adhesive Joints after "Thermal Shock"

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.791.224 ◽

2015 ◽

Vol 791 ◽

pp. 224-231

Author(s):

Mariusz Kłonica

Keyword(s):

Shear Strength ◽

Comparative Analysis ◽

Epoxy Resins ◽

Adhesive Joints ◽

Strength Tests ◽

Before And After ◽

316L Steel ◽

Scientific Standards ◽

Static Shear ◽

Comparative Nature

The paper presents a comparative analysis of static shear strength of single-lap adhesive joints of 316L steel, before and after mechanical treatment with a coated abrasive tool. The research was of comparative nature and focused on adhesive joints subjected to variable thermal stress and adhesive joints not subjected to such shock. Adhesives based on epoxy resins were used. The results of static shear strength tests of single-lap adhesive joints for different variations of material preparing were analysed. The obtained results were analysed statistically and in compliance with relevant scientific standards. The scope of tests covered a relatively short fatigue cycle, i.e. 200 cycles in the range of temperatures between-40°C and +60°C. The main aim of the research was to determine the relation between joint strength and thermal fatigue. The paper presents conclusions resulting from the conducted research.

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Synergetic effects of carbon nanotubes and triblock copolymer on the lap shear strength of epoxy adhesive joints

Composites Part B Engineering ◽

10.1016/j.compositesb.2019.107457 ◽

2019 ◽

Vol 178 ◽

pp. 107457 ◽

Cited By ~ 6

Author(s):

Panta Jojibabu ◽

Y.X. Zhang ◽

Andrew N. Rider ◽

John Wang ◽

B. Gangadhara Prusty

Keyword(s):

Carbon Nanotubes ◽

Shear Strength ◽

Triblock Copolymer ◽

Epoxy Adhesive ◽

Adhesive Joints ◽

Lap Shear Strength ◽

Synergetic Effects ◽

Lap Shear

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Effect of different carbon nano-fillers on rheological properties and lap shear strength of epoxy adhesive joints

Composites Part A Applied Science and Manufacturing ◽

10.1016/j.compositesa.2015.12.003 ◽

2016 ◽

Vol 82 ◽

pp. 53-64 ◽

Cited By ~ 50

Author(s):

Panta Jojibabu ◽

M. Jagannatham ◽

Prathap Haridoss ◽

G.D. Janaki Ram ◽

Abhijit P. Deshpande ◽

...

Keyword(s):

Shear Strength ◽

Rheological Properties ◽

Epoxy Adhesive ◽

Adhesive Joints ◽

Lap Shear Strength ◽

Lap Shear

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The Influence of Sandblasting Process Parameters of Aerospace Aluminium Alloy Sheets on Adhesive Joints Strength

Materials ◽

10.3390/ma14216626 ◽

2021 ◽

Vol 14 (21) ◽

pp. 6626

Author(s):

Izabela Miturska-Barańska ◽

Anna Rudawska ◽

Elżbieta Doluk

Keyword(s):

Shear Strength ◽

Aluminium Alloy ◽

Process Parameters ◽

Preparation Method ◽

Incidence Angle ◽

Surface Preparation ◽

Epoxy Adhesive ◽

Adhesive Joints ◽

Displacement Speed ◽

Pressure Nozzle

In this study, the influence of sandblasting process parameters as a surface preparation method on the strength of single-lap adhesive joints of EN AW 2024 T3 aerospace aluminium alloy sheets was determined. Eleven sets of sandblasting parameters were used, which were determined according to a determined experimental plan. The variable factors in the sandblasting process were pressure, nozzle distance, and workpiece displacement speed. The sand jet incidence angle was constant. Garnet 80 E+ was the abrasive material that was used. The joints were made using an epoxy adhesive composition of Epidian 5 epoxy resin and a PAC curing agent. The influence of the surface preparation method on the surface roughness and contact angle to determine the surface free energy was evaluated. The shear strength of the adhesive joints was also determined, which finally allowed the evaluation of the applied surface treatment variants. The obtained results were subjected to statistical analysis, which indicated that the highest shear strength of the adhesive joints was obtained for samples whose surfaces were treated by sandblasting at parameter configurations in which the pressure was 5–6 × 105 Pa; the distance between the nozzle and the sandblasted surface should not be greater than 97 mm, and the speed at which the workpiece moves in relation to the nozzle should not be greater than 75 mm/min.

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609 Evaluation of Shear Strength and Failure Characteristics of Epoxy Adhesive Joints of Dissimilar Adherends

The Proceedings of Ibaraki District Conference ◽

10.1299/jsmeibaraki.2010.18.165 ◽

2010 ◽

Vol 2010.18 (0) ◽

pp. 165-166

Author(s):

Mohd AFENDI ◽

Tokuo TERAMOTO

Keyword(s):

Shear Strength ◽

Epoxy Adhesive ◽

Adhesive Joints ◽

Failure Characteristics

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Effects of Surface Treatment and Loading Speed on Adhesive Strength of Aluminum to Polycarbonate Lap Joints

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.261-263.405 ◽

2004 ◽

Vol 261-263 ◽

pp. 405-410 ◽

Cited By ~ 1

Author(s):

Do Won Seo ◽

Ho Chel Yoon ◽

J.Y. Lee ◽

Jae Kyoo Lim

Keyword(s):

Surface Roughness ◽

Shear Strength ◽

Surface Treatment ◽

Adhesive Strength ◽

Lap Joints ◽

Adhesive Joints ◽

Tensile Shear Strength ◽

Tensile Shear ◽

Mechanical Removal ◽

Strength Of Adhesive Joints

The bonding strength of adhesive joints is influenced by the surface roughness of the joining parts. However, the magnitude of the influence has not yet been clarified because of the complexity of the phenomena. In this study, it is showed that surface treatment affects adhesive strength and durability of aluminum/polycarbonate single-lap joints, and loading speed affects tensile-shear strength of adhesive joints. To evaluate the effect of surface treatments on the adhesive strength, several surface treatment methods are used, that is, cleaning, grinding, SiC polishing and sand blasting. It is showed that an optimum value of the surface roughness exists with respect to the tensile-shear strength of adhesive joints. The adhesive strength shows linear relationship with the surface roughness and loading speed. And the mechanical removal of disturbing films of lubricants, impurities and oxides make adhesive strength increase significantly.

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