Powder coating – The go-to coating for industrial applications in India
Powder coating has grown into a multi-billion rupee business worldwide. It is a part of our lives every day, coating everything from household items and bicycles to heavy duty machinery. Its popularity comes down to two things: protection and style. As a coating method it is flexible, durable, highly protective, and its strengths are not at the cost of its appearance. Powder coating comes in a wide range of colours and finishes to ensure your project looks and performs exactly as you need.
This article will outline the advantages, uses, and process of powder coating, as well as where you will find powder coating applicators and suppliers in India.
Get to know the powder coating process step by step
Powder coating is a process where paint is applied to a substrate in powder form. Usually a paint is a binder and a pigment suspended in a liquid solvent, but a powder coat is solvent free, it is the binder and pigment blended into a fine powder. The application process can be broken into 3 steps: substrate preparation/pre-treatment, powder application, and curing.
The correct preparation of the substrate is paramount in any coating application. Firstly, remove all oil, grease, dirt, grime and ensure that the part is completely clean. Then the part is stripped – this removes previous coatings. Finally the part is sandblasted. This stage cleans the part down to bare metal and creates a texture on the substrate which allows the powder coating to adhere to it. After a final clean the part is ready. This step is slightly different depending on the substrate.
Powder coating is applied through one of two methods: electrostatic spraying, and fluidised bed. The electrostatic spray process applies the powder through a specialty spray gun which gives the powder an electrostatic charge. This causes the powder to stick to the grounded part. These powders are used for instance by the appliances industry. In the fluidised bed process, the part is heated and dipped into a hopper filled with fluidised powder. The heat melts the powder onto the part immediately, though a post cure may still be needed. Thermoplastics are less common, yet they are present in the automotive industry and other industries that deal with mass production.
The final step is to bake the powder coat, causing it to melt, flow, and form a continuous liquid film. This ensures an even coverage over the part. Depending on the type of powder, there is either a further step for curing (for thermosetting powders), or the process stops here (for thermoplastic powders). Thermosetting powders undergo chemical crosslinking when heated and will not melt again, where thermoplastics do not crosslink and will melt again if heated. A properly cured thermosetting powder is tough and impact resistant.
5 reasons to choose for powder painting
Nowadays, powder coating is suitable for a wide range of materials and purposes including metals, glass, MDF, and even wood and plastics. Powder coating has many features and benefits that make it the coating of choice. Just a few of these are:
- Durability: It is more resistant to chipping, scratching, fading, and wearing than other finishes.
- Appearance: Unlimited colour and finish choice (including smooth, textured, gloss, matt, iridescent, glitter, and candy) with thicker applications that liquid coatings and no running or sagging. Therefore powders are used for coating consumer goods such as furniture and appliances.
- Environmentally friendly: Solvent-free, very low/zero VOC, and excess powder can be recovered and reused, so minimal waste and under 1% material loss. For example Teflon powders are more eco friendly than the liquid alternatives.
- Cost efficiency: It is cheaper than liquid paint, and is a one coat application with low operation costs.
- Flexibility: Suitable for a wide range of materials and purposes including metals, glass, MDF, and even wood and plastics.
Powder coating manufacturers and contractors in India
Powder coating is generally charged by surface area of the part to be coated. Different finishes and colours are priced differently, and the type of job will also be reflected in the prices – wheels or rims for example may be done per wheel, where a railing is charged by length. Below is a table listing a selection of powder coating manufacturers in India.
|Dulux – Central India Paints||DLF Epitome, Building No.5, Tower A, 20th Floor, DLF Cyber City Phase III, Gurgaon – 122 002, Haryana, India|
|PPG Asian Paints||Unit No.1, 4th Floor, The Centrium, Phoenix Market City, L.B.S. Marg, Kurla West, Mumbai – 400070. India.|
|Kansai Nerolac Paints Ltd||Nerolac House, Near Shri Ram Mills, Ganpatrao Kadam Marg Lower Parel West, Mumbai – 400013, India|
In case you are looking for powder coating contractors in India, take a look at our pages dedicated to powder coating services in the biggest cities. If you would like more information about powder coating, or need a powder coating contractor for a project elsewhere, contact us! Our experts are here to help. Just use the “Request a quote” button at the bottom of this article and take advantage of 100% free quoting service.
- Powder coaters in Mumbai
- Powder coaters in Delhi
- Powder coaters in Kolkata
- Powder coaters in Bangalore
When looking for a powder coating service in India, or planning to become a specialist, it is good to be aware of the education and certificates provided. For example the Princeton Academy in Mumbai provides seminars in powder coating to educate specialists.