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Study on Mg-based Biodegradable Orthopaedic Implants and their Corrosion Behaviour: A Review
Published in Purna Chandra Mishra, Muhamad Mat Noor, Anh Tuan Hoang, Advances in Mechanical and Industrial Engineering, 2022
Pradipta Kumar Rout, Dinesh Kumar Rathore, Sudesna Roy
The corrosion rate of magnesium-based implants can be controlled significantly by surface modification such as coating, burnishing and achieving a suitable surface finish. Metallic, ceramic, polymeric and organic materials are used for coating.
Morphology of Polymer Coatings
Published in Sanjay Mavinkere Rangappa, Jyotishkumar Parameswaranpillai, Suchart Siengchin, Polymer Coatings, 2020
Jyoti Sharma, Manju Rawat, Daisy Sharma, Sanjeev Kumar Ahuja, Avinash Chandra, Sanghamitra Barman, Raj Kumar Arya
Coatings are a part of daily life in the form of architectural, automotive, or protection, functional or decorative. The combinations of conductive and biodegradable polymers help in enhancing the properties of the polymeric coatings that have potential applications in electrodes, antistatic coatings, biosensors, membranes, light-emitting diodes, etc. (Srinivasarao et al., 2001; Yabu et al., 2005). The main purpose of the coatings is to provide the desired appearance and to protect the substance from corrosion, scratches, abrasion, chemical attack, and temperature (Sharma et al., 2017a).
Printed Circuit Board Terminology
Published in Robert P. Hedden, Cost Engineering in Printed Circuit Board Manufacturing, 2020
Some printed circuit assemblies are coated with a protective film to minimize the effects of humidity and other environmental contaminents. Film applications are usually thin, up to 0.005 inch thick. There are a variety of coatings used: acrylic, urethane, epoxy, silicone, polyimide, and diallylphthalate (DAP, a varnish). Coatings are applied by dipping, brushing, spraying, and flow coating. Multiple coating may be required, and air drying and draining are required. Inspection and touch-up under magnification are required. Coatings vary from removable to nonremovable.
Novel advanced copper-silver materials produced from recycled dendritic copper powders using electroless coating and hot pressing
Published in Powder Metallurgy, 2022
Temel Varol, Onur Güler, Serhatcan Berk Akçay, Hüseyin Can Aksa
There are various techniques to increase the oxidation resistance of copper. Alloying, passivation and surface coating techniques are some of these. Oxidation resistance of copper can be improved with alloying elements such as Cr, Ag, Ni: however, the addition of different elements to improve oxidation resistance decreases electrical and thermal conductivity of copper. Surface coating techniques can be sorted galvanising, electrochemical coatings, physical or chemical vapour deposition, electroless coatings, thermal spraying. Electroless coating is a chemical reducing technique that can improve oxidation resistance by coating an element to a substrate surface. The reason to prefer electroless coating is that it is relatively easier to apply than other techniques and allows to obtain a homogenous coating layer on the surface of the substrate due to not dependence on geometry. Electroless silver coating is one of the electroless coating techniques, and it can be easily applied on the copper surface. The higher oxidation resistance of silver than copper and higher electrical and thermal conductivity properties are provided to prefer this technique to improve the oxidation resistance of copper [13–20].
Effect of surfactant on drying and rheology of poly (vinyl alcohol) – water coatings
Published in Drying Technology, 2022
Raj Kumar Arya, D. Giribabu, Jyoti Sharma, Manju Rawat, Avinash Chandra, Sanghamitra Barman
Nowadays, from a household to an industrial level, a coating can protect the substance, enhances its durability and appearance, and the value of any product to which it is applied.[1] Coatings are generally applied in the field related to architectural, industrial, decorative, or any special purpose.[2] Coatings are classified based on their components involved in making, i.e., organic coatings and inorganic coatings. Organic coatings have carbon, modified or refined petroleum products and also various pigments, solvents, fillers, and additives. It includes products like alkyd coatings, epoxy coatings, and polyurethane coatings, etc. Another type of coatings that is inorganic coatings has additives, pigments, and enamels. Inorganic coatings protect against the various stressors in industrial environments. Inorganic coatings are gaining more interest due to their eco-friendly nature.[3] They have binders and additives that provide protection and enhance the performance of the coatings.[4]
Surface and bulk modification techniques to mitigate silt erosion in hydro turbines: a review of techniques and parameters
Published in Surface Engineering, 2022
The process of depositing a hard layer on the surface of the substrate, i.e. coating is being very popular in the last decade. The preventive action of the hard layer helps in losing the material by slurry erosion at reduced rates. In the literature, many coating powders have been applied to many materials by various methods. The slurry erosion resistance of coated material depends on many factors like adhesion of coating powder with the substrate material, density of the coated layer, the thickness of the coated layer, surface roughness, hardness, and bonding, etc. These factors are mainly decided based on the nature of coating and substrate material, and the method of coating [42]. The coating methods employed in the literature include coating by thermal spray, electroplating, hard overlay, and physical and chemical vapour deposition.