The Characteristics of Metal Spray Powders

Metal or thermal spraying is the technology that protects and extends the life of a wide variety of products in the most volatile environment. It will ensure that the coating of products lasts for a longer duration irrespective of different situations. The thermal metal spray powder is the way of depositing high-quality deposits on relatively low-cost surfaces. The medium and high hardness materials and carbide composites can be deposited on a variety of metals to achieve machine strength, wear, and corrosion resistance. There are different types of metal powders available to suit the most applications.

The introduction to metal spray for corrosion protection

The variety of metalized coatings can be broken down into 2 main categories that include finishing coatings, such as anti-corrosion or decorative coatings, and engineering coatings such as wear resistant and thermal barrier coatings. Metal spraying is ensured in a wide range of anti-corrosion and engineering markets, that includes oil & gas, marine, petrochemical, and construction industries. The methods of thermal spraying involve the projection of small molten particles onto a surface adhering to continuous coating. 

Metal Spray Powders

The methods of thermal spraying involve the projection of small molten particles onto a prepared surface adhering to the formation of a continuous coating. A heat source, a spray material, and an atomization method are required for the creation of the molten particles. The particles flatten upon contact and then onto each other as the thickness increases. The process imparts very little heat to the substrate as the heat energy in the molten particles is small relative to the size of the sprayed component. 

The metal powder and their common uses

The powdered metals are extremely versatile and result in less waste when they are used to manufacture certain parts and as the coating for other metals. Some of the popular powdered metals are –
  • Aluminum Powder
  • Bismuth Powder
  • Cadmium Oxide Powder
  • Granular Copper
  • Iron Powder
  • Manganese Powder
  • Nickel Powder
  • Red and Black Cupric Oxide
  • Tin Powder
  • Zinc Powder
The metal sprays are the recent phenomenon in the 20th century and it originally included spraying of molten metal particles. The process made it possible the application of metal on prepared elements, without reaching the heat input necessary with welding or melting. The sprays are available in a wide range of particle size distributions, from 5 μm to 45 μm. A metal object can be surface coated to achieve high resistance to wear and corrosion. The powders are suited to powder welding and laser cladding.

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