Condition of dispersed polytetrafluoroethylene in production of metal-polymer coatings by electrocontact coalescence

At repair enterprises, various metal-polymer materials are used to restore the interfaces. Metal-polymer materials can be filled with the following components: steel, bronze, aluminum, titanium. The main advantages of metal polymers are their resistance to negative environmental influences, mechanical friction and high temperatures. (Research purpose) The research purpose is in analyzing the possibilities of metal-polymer materials for effective use in the restoration of machine parts and to give suggestions for improving their physical and mechanical properties during the restoration work. (Materials and methods) Authors studied metal-polymer materials of well-known companies: "Belzona" (USA), "Durmetal" (Switzerland), "Diamant" (Germany), "Loctite" (USA), Chester Molecular (Poland). The article presents the data on their use in the restoration of various parts. The metal polymer materials of foreign companies are characterized by stable quality and high physical and technical characteristics; domestic materials are still inferior to imported ones due to the low quality of the incoming components. (Results and discussion) The main property of coatings is the adhesive strength, which largely determines the resource of the restored part. The main factors that affect the adhesive strength are described in the article. It is possible to significantly increase the adhesive strength of the coatings due to the preliminary electric spark treatment of the worn part. The article presents data on the effectiveness of electric spark coatings as an independent technological process in the restoration of the part. The use of a combined technology of electric spark processing with subsequent application of metal-polymer materials provides undeniable advantages in the restoration of parts. (Conclusions) To improve the physical and mechanical properties of coatings, it is advisable to combine the technology of electric spark processing with the use of metal-polymer coatings. This will expand the possibilities of using part recovery technologies.

Download Full-text

Antifriction properties study of metal-polymer coatings obtained by diffusion welding in vacuum

10.1063/5.0072924 ◽

2021 ◽

Author(s):

Alexander Lavrishchev ◽

Nikolay Smirnov ◽

Alexander Murygin ◽

Oleg Denisenko

Keyword(s):

Polymer Coatings ◽

Diffusion Welding ◽

Antifriction Properties ◽

Metal Polymer

Download Full-text

Surface Modification by Ordered Monolayers: New Ways of Protecting Materials Against Corrosion

MRS Bulletin ◽

10.1557/s0883769400052696 ◽

1999 ◽

Vol 24 (7) ◽

pp. 43-47 ◽

Cited By ~ 44

Author(s):

M. Rohwerder ◽

M. Stratmann

Keyword(s):

Polymer Coatings ◽

Reaction Model ◽

Local Analysis ◽

Kelvin Probe ◽

Polymer Interface ◽

Polymer Metal ◽

Cause Of Failure ◽

Automotive Parts ◽

Electronic Parts ◽

Metal Polymer

Metal/polymer composites are used in numerous technical applications. For example, polymer coatings on metal surfaces are used for corrosion protection, metal films on polymers inhibit static buildup, and polymers between two metals can serve as a “glue” for connecting materials that cannot be welded. Polymer/metal composites also play an important role in modern electronics. In condensers, polymers serve as insulating layers between metallic leads and are used to encapsulate entire electronic circuits. In all circumstances, interfaces are formed between the two different materials, and since the chemistry and structure change abruptly, interfacial failure is frequently observed.The cause of failure may just be mechanical (e.g., shrinkage of the polymer during curing), or the interface stability may be degraded by attack of aggressive species, resulting in delamination. More specifically, loss of adhesion is directly caused by interfacial electrochemical reactions that nucleate at a defect and progress into intact regions of the interface. This occurs for encapsulated electronic parts in humid atmospheres as well as for lacquers on automotive parts.Thus the investigation of corrosion reactions at a buried interface is an important area of research, but it is made very difficult by the fact that most electrochemical methods do not give information on localized reaction kinetics at a buried (metal/polymer) interface. This situation has changed with the invention and development of the scanning Kelvin probe (SKP). This method allows, for the first time, local analysis of reactions occurring at a buried metal/polymer interface. Based on the results obtained with the SKP, a detailed reaction model for the delamination process has been developed. This understanding has led to the development of new approaches that protect the interface from delamination. The idea is to chemically modify the interface using Afunctional molecules that promote adhesion between metal and polymer surfaces.

Download Full-text

Morphology and structure of antibacterial nanocomposite organic–polymer and metal–polymer coatings deposited from active gas phase

RSC Advances ◽

10.1039/c3ra23284k ◽

2013 ◽

Vol 3 (28) ◽

pp. 11226 ◽

Cited By ~ 11

Author(s):

A. A. Rogachev ◽

M. A. Yarmolenko ◽

A. V. Rogachou ◽

D. V. Tapalski ◽

Xiaoheng Liu ◽

...

Keyword(s):

Gas Phase ◽

Polymer Coatings ◽

Organic Polymer ◽

Morphology And Structure ◽

Metal Polymer

Download Full-text

MODERN TECHNOLOGIES FOR THE RESTORATION OF MACHINE PARTS

Tekhnicheskiy servis mashin ◽

10.22314/2618-8287-2021-59-1-154-161 ◽

2021 ◽

Vol 1 (142) ◽

pp. 154-161

Author(s):

Alexander Yu. Kostyukov ◽

Keyword(s):

Mechanical Properties ◽

Adhesive Strength ◽

Physical And Mechanical Properties ◽

Main Property ◽

Polymer Coatings ◽

Polymer Materials ◽

Research Purpose ◽

Properties Of Coatings ◽

Machine Parts ◽

Metal Polymer

At repair enterprises, various metal-polymer materials are used to restore the interfaces. Metal-polymer materials can be filled with the following components: steel, bronze, aluminum, titanium. The main advantages of metal polymers are their resistance to negative environmental influences, mechanical friction and high temperatures. (Research purpose) The research purpose is in analyzing the possibilities of metal-polymer materials for effective use in the restoration of machine parts and to give suggestions for improving their physical and mechanical properties during the restoration work. (Materials and methods) Authors studied metal-polymer materials of well-known companies: "Belzona" (USA), "Durmetal" (Switzerland), "Diamant" (Germany), "Loctite" (USA), Chester Molecular (Poland). The article presents the data on their use in the restoration of various parts. The metal polymer materials of foreign companies are characterized by stable quality and high physical and technical characteristics; domestic materials are still inferior to imported ones due to the low quality of the incoming components. (Results and discussion) The main property of coatings is the adhesive strength, which largely determines the resource of the restored part. The main factors that affect the adhesive strength are described in the article. It is possible to significantly increase the adhesive strength of the coatings due to the preliminary electric spark treatment of the worn part. The article presents data on the effectiveness of electric spark coatings as an independent technological process in the restoration of the part. The use of a combined technology of electric spark processing with subsequent application of metal-polymer materials provides undeniable advantages in the restoration of parts. (Conclusions) To improve the physical and mechanical properties of coatings, it is advisable to combine the technology of electric spark processing with the use of metal-polymer coatings. This will expand the possibilities of using part recovery technologies.

Download Full-text

An Application of Antifriction Coatings to Increase the Lifetime of Friction Units

MATEC Web of Conferences ◽

10.1051/matecconf/202134603024 ◽

2021 ◽

Vol 346 ◽

pp. 03024

Author(s):

Aleksandr V. Antsupov ◽

Artem A. Fedulov ◽

Alexey V. Antsupov ◽

Victor P. Antsupov

Keyword(s):

Thin Films ◽

Sliding Friction ◽

Experimental Studies ◽

Rolling Friction ◽

Polymer Coatings ◽

Flexible Tool ◽

Friction Units ◽

Antifriction Coatings ◽

Friction Surfaces ◽

Metal Polymer

This article presents a generalization of the results of theoretical and experimental studies on increasing the reliability of friction units by making antifriction coatings on the working surfaces with a flexible tool. The principle scheme and the essence of the method of cladding with a flexible tool (CFT) - shock-frictional forming of thin films from various materials on the surface of the workpiece with flexible elements of rotating metal brushes are described. Versions of cladding machinery and many parts of movable joints with various forms of friction surfaces, on which various metal, polymer, single and two-layer antifriction coatings are applied, are presented. The modification of the frictional application of polymer coatings is shown. The following is a brief description of the most significant effective results for increasing the durability of the industrial sliding friction and rolling friction units.

Download Full-text