A Magnetic coating is a covering that is applied to the surface of an object, usually referred to as the substrate. The purpose of applying the coating may be decorative, functional, or both.Coatings may be applied as liquids, gases or solids e.g. Powder coatings.
Magnetic Coating applications are diverse and serve many purposes, Coatings can be both decorative and have other functions. Most magnetic coatings to some extent protect the substrate, such as maintenance coatings for metals and concrete.
A decorative coating can offer a particular reflective property such as high gloss, satin or flat/matt appearance. A major coating application is to protect metal from corrosion.
This use includes preserving machinery, equipment and structures.Most automobiles are made of metal. The body and underbody are typically coated.Anticorrosion coatings may use graphene in combination with water-based epoxies.
Nickel coating is the most commonly used on the surface of Neodymium or Rare Earth magnets. 3 layers in total, of nickel then copper and a final layer of nickel encase the Magnetic material to create a smooth, shiny finish and give conditional protection to the alloy compound inside.
Nickel coatings are suitable for indoor use and for applications requiring low friction or good response to shear forces. Nickel coatings do not have long term resistance to moisture exposure or marine environments.
The Global EV Magnetic coating market accounted for $XX Billion in 2022 and is anticipated to reach $XX Billion by 2030, registering a CAGR of XX% from 2023 to 2030.
ASG Develops ZINC Coating
Zinc coatings offer higher resistance to corrosion than Nickel coatings and so are ideal for prolonged exposure to water or for outdoor use.
Zinc coatings have a silvery matte or dull patina and over time will develop an oxidised protective barrier between the magnetic material and the environment, reducing corrosion and increasing the magnets longevity.
Zinc also provides high resistance to abrasion and scratching. Zinc coated Neodymium magnets are used in motors and the Automotive industry.
Zinc coatings are smooth and aesthetically attractive and commonly used in art, fashion, decorative and advertising displays.
As a thin extra layer over the standard Nickel coat, Zinc coatings are slightly more expensive. Zinc is very conductive material and also has excellent water resistant properties.
Zinc coatings are not resistant to abrasion or scratching so should not be exposed to these environments. Jewellery makers and therapeutic health practitioners also find them appealing alternatives to nickel for their Zinc surface.
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