scholarly journals Characterization of Surface Coating Techniques for Improved Performance

2020 ◽  
Vol 5 (9) ◽  
pp. 5-9
Keyword(s):  
Surface Coating ◽  
Research Work ◽  
Hardness Test ◽  
Powder Coating ◽  
Load Force ◽  
Wood Block ◽  
Powder Coatings ◽  
Coating Technology ◽  
Scratch Hardness ◽  
Coated Materials

Surface coating has evolved with time, tracking the demands of the processing industry. This research activity, studies the significance of powder coatings in the evolution of existing conventional surface coating technology for their practical applications in the field of metal coating, particularly office and home appliances. The first objective of this work involves a systematic comparison between polymer powder coatings with liquid-based coatings. In the second objective, a comparison between the polymer coatings with additive filled powder coating was performed. Various conventional substrates (such as copper, aluminium, galvanized iron, brass, cement plank, wood block) were used for this study. The materials were first dry scuffed and then dipped in 3 in 1 chemical (zinc phosphate chemical and magnesium phosphate) for the primer coat. The prepared substrates were surface coated with liquid paint (on one side of the panel) using spray gun and powder paint (on another side of panel) using electrostatic spraying. The coated panels are then subjected to various standard (ISO) characterization techniques such as Scratch hardness test, Flexibility test, Thickness test, Adhesion test, Impact resistance test etc to analyze the effectiveness of the coatings applied. The quantitative and qualitative results thus obtained using powder coatings were promising (e.g: As the load progressively kept increasing i.e. 1000-2000 gm, mild scratches were noticeable on liquid coated substrates whereas powder coated metal panels have shown a greater resistance to scratch damage) as the test values determined high strength quality and durability (in-line with the standards) in comparison with liquid coatings. Also, the doping of additive (graphene) in small quantity has improved characteristics and qualities of the powder coated materials (e.g: graphene based powder coating has endured scratch hardness test beyond 2500 gms load force compared to simple powder coating). The findings of the current research study has confirmed the advantage of the powder coating technology and also deliberated the effect of fine powder flow ability. The important future prospects of this research work is that., powder coatings will stand on the threshold of exciting breakthroughs thus opening new frontiers by being able to coat thick steel components and even non-metal substrates. Also, the recent advances in powder coating technology with anticorrosive additives will result in bonded metallic coatings that deliver a unique, quality appearance.

Influence of Film-Forming Components on the Corrosion Resistance of Powder Coating

2019 ◽  
Vol 968 ◽  
pp. 143-152 ◽  
Author(s):  
Vladimir Gots ◽  
Oles Lastivka ◽  
Oleksandr Tomin ◽  
Olga Kovalchuk
Keyword(s):  
Corrosion Resistance ◽  
High Performance ◽  
Powder Coating ◽  
Powder Coatings ◽  
High Corrosion Resistance ◽  
Coating Technology ◽  
Protective Properties ◽  
Coating Performance ◽  
Film Forming ◽  
Industrial Use

There are shown studies on influence of film-forming components on the corrosion resistance of powder coating. Protective and decorative powder coatings - one of the most promising types of paints and varnishes for industrial use. Their main advantages are: absence of solvents, practically waste-free coating technology (the degree of powder utilization during application is close to 100 relative simplicity and cost-effectiveness of the production process of coating. The study of protective properties of powder coatings is associated with the detection of high performance properties and high corrosion resistance of the material. Although corrosion resistance of powder coating performance continues to improve via the design of more effective film-forming components the nomenclature of which is wide enough.

scholarly journals EFFICIENCY OF MODIFYING ADDITIVES IN POWDER COATING MATERIALS

2021 ◽  
pp. 47-57
Author(s):  
V.І. Gots ◽  
◽  
О.V. Lastivka ◽  
О.О. Tomin ◽  
◽  
...  
Keyword(s):  
Surface Tension ◽  
Silicon Dioxide ◽  
Mechanical Characteristics ◽  
Powder Coating ◽  
Coating Film ◽  
Powder Coatings ◽  
High Effectiveness ◽  
Modifying Additives ◽  
Polymer Resin ◽  
Technical Specifications

Rapid rates of development in production of powder coatings are, in comparison to liquid paint-and-lacquer materials, evidence of their importance, high effectiveness and prospectivity. The increase in popularity of powder coatings can be explained by their environmental adequacy and attractiveness from the perspective of the environmental protection as well as high effectiveness related to the possibility of obtaining high quality protective and decorative coatings during the one-layer application. At the same time, it is obvious that during modern powder coating-and-lacquer materials have not exhausted all possibilities of improving pharmaceutical compositions and expanding the assortment as well as modernizing their production technology the relatively short period of their development. The composition of the thermosetting powder coating contains five key components: polymer resin, hardener, pigments, fillers and functional additives. In general, the polymer resin and hardener play a key role in ensuring necessary mechanical characteristics and lifespan of the powder coating. In this case, the role of functional (modifying) additives is extremely important to obtain characteristics that are often fundamentally required to meet predetermined technical specifications of the products and needs of end users. Additives play an important role in forming properties of powder coatings and coatings based on them as they have become their integral part for several main reasons: because of control of rheological properties, surface defects as well as light and temperature stabilization of coatings. The study deals influence of modifying additives on properties of the powder coating. The authors using rheological and degassing modifying additives with different nature of the main active substance. It was found that the additives based on the acrylate polymer adsorbed on the silicon dioxide in the form of Byk-3900P and on the polyoxyethylene derivative of the castor oil in the form of Luvotix R400 decreasing the surface tension in the coating film, which, in its turn, contributes to the increase in the wettability of base during the melting of the powder coating, decrease the ‘orange peel’ effect during the cross-linking, reduction in pinholes on the obtained surface and improvement of mechanical characteristics of the coating. At the same time, rheological additives based on the bentonite in the form of Luvogel 4B and on the hydrophilic silicon dioxide in the form of Cab-o-sil M5 cause the increase in the surface tension in the coating film, which, in its turn, leads to the worsening of flow, appearance and mechanical characteristics of the powder coating.

scholarly journals Utilization of rapid prototyping technology for the fabrication of an orthopedic shoe inserts for foot pain reprieve using thermo-softening viscoelastic polymers: A novel experimental approach

2020 ◽  
Vol 53 (3-4) ◽  
pp. 519-530
Author(s):  
Shubham Sharma ◽  
Jujhar Singh ◽  
Harish Kumar ◽  
Abhinav Sharma ◽  
Vivek Aggarwal ◽  
...  
Keyword(s):  
Rapid Prototyping ◽  
Thermoplastic Polyurethane ◽  
Research Work ◽  
Testing Machine ◽  
Three Dimensional ◽  
Hardness Test ◽  
Thermoplastic Elastomer ◽  
Bending Test ◽  
Foot Orthosis ◽  
Orthotic Insoles

This research work has been completed by concentrating on the structure of inserts for foot orthosis fabricated by utilizing rapid prototyping technology. Thermoplastic elastomer and thermoplastic polyurethane are the most commonly used materials that are being used in customized three-dimensional printed orthotic insoles, which are comfortable and prevent the user in many foot disorders. Thermo-softening viscoelastic polymers, explicitly Filaflex and Ninjaflex, have been printed by utilizing Flash Forge three-dimensional printers to evaluate the mechanical properties of specimens with alterations of the percentage rate fill-up design replicas. The results are compared on the basis of hardness test, flexural/bending test, and tensile test using Durometer and Universal Testing Machine (UTM). It has also been observed that the most significant effecting factor is infill density.

Compressed Air on Demand

1998 ◽  
Vol 120 (08) ◽  
pp. 74-75
Author(s):  
Michael Valenti
Keyword(s):  
Powder Coating ◽  
Compressed Air ◽  
Automobile Engineering ◽  
Coating Technology ◽  
On Demand ◽  
Service Production ◽  
Compressed Gas ◽  
Air System ◽  
Air Capacity ◽  
Motor Production

This article analyzes that the demand of compressed gas has increased manifold in automobile engineering. A manufacturer of gear motors retrofitted its system to provide a more reliable supply of air, which help reduce its energy bills by over $40,000 a year. When Bodine Electric Co. built a fractional horsepower gear-motor plant in Chicago 35 years ago, management intentionally overbuilt the compressed-air system to serve projected expansion. As it turned out, Bodine’s motor production never came near to stretching its compressed-air system’s capacity, largely because the company replaced its spray-paint delivery system with a powder coating technology. To ensure that compressed-air capacity was more in line with demand, assistance was sought in early 1996 from Chicago-based Commonwealth Edison (ComEd) in purchasing a new compressed-air system. In addition to the annual savings in electricity, the new compressors provide Bodine with a more reliable supply of compressed air. The system is completely backed up, so that even if one air compressor goes completely out of service, production will continue.

Study of rheological behaviours of electrostatic thermoset powder coatings

e-Polymers ◽  
2009 ◽  
Vol 9 (1) ◽  
Author(s):  
Morteza Ehsani ◽  
Ali Akbar Yousefi ◽  
Saeed Samiei Yeganeh
Keyword(s):  
Mechanical Properties ◽  
Dynamic Viscosity ◽  
Physical And Mechanical Properties ◽  
Powder Coating ◽  
Curing Temperature ◽  
Design Parameters ◽  
Powder Coatings ◽  
Gel Time ◽  
Rheological Measurements ◽  
The Impact

AbstractThe use of dynamic viscosity/time (temperature) cure curves is seen as a powerful technique to quantify formulation and resin design parameters. The behaviour of different thermoset powder coating systems, epoxy/polyester (50/50, 40/60 and 30/70) as well as the impact of the filler, the curing temperature and the frequency upon gel-time have been examined based upon the rheological measurements and compared with PE/TGIC systems. Two disparate methodologies have been utilized to determine gel-time. The behaviour of dissimilar systems bearing different formulations has been compared by means of the non-isothermal DSC test. The effects of resin percentage and the formulation on physical and mechanical properties of coating have been studied.

Characterizing Chicken Eggshell Reinforced Polypropylene (PP)

2011 ◽  
Vol 264-265 ◽  
pp. 871-879 ◽  
Author(s):  
Sivarao ◽  
Mohd Rizal Salleh ◽  
A. Kamely ◽  
A. Tajul ◽  
Taufik
Keyword(s):  
Calcium Carbonate ◽  
Operating Temperature ◽  
Research Work ◽  
Hardness Test ◽  
Sulfated Polysaccharides ◽  
Potential Source ◽  
Chicken Eggshell ◽  
Egg Shell ◽  
Creep Modulus ◽  
Flexural Tests

Chicken eggshell (ES) is an industrial by product containing 95% calcium carbonate and its disposal constitutes a serious environmental hazard. ES contains about 95% calcium carbonate in the form of calcite and 5% organic materials such as type X collagen, sulfated polysaccharides, and other proteins. Although there have been several attempts to use eggshell components for different applications, its chemical composition and availability makes eggshell a potential source of filler for PP composites. In this research work, different proportions of chicken eggshell as bio-filler for polypropylene (PP) composite were compared with different operating temperature by creep test, hardness test and SEM photomicrographs. The eggshell had been prepared by blending and sieving them into granule size of less than 160μm. The granules were then mixed with polypropylene into four weight ratios, 10%, 20%, 30% and 40% respectively using fine extruder, where silane was used as the coupling agent. From the result, it was learnt that, the ES filler had improved Creep Strain and Creep Modulus for the operating temperatures of 34°C and 80°C. Tensile and flexural tests were also performed to study the pattern and behaviour of the chicken egg shell particulated polypropylene. In general, the findings can be concluded that not all ratios of particulation yielded positive as expected, but there were also conditions where virgin polypropylene yields better result depending on the test type and composite matrices.

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