4 Important Stages in the Proper Coating Process

concrete coating process

Table of Contents

Coating is an essential process in the manufacture of any technological device. From simple ovens to the most sophisticated computers, most electronic devices in use have small parts that are sensitive to high temperatures and certain conditions.

To protect these parts, coating is needed so that the device can meet the quality standards set. In addition, coating also aims to make the appearance more attractive.

Meanwhile, the meaning of “coating” is coating. As the name implies, coating is a coating process which consists of applying a coating material to the surface of a particular object or also called a substrate. The objects to be coated also vary.

Coating is an important process in maintaining the durability of a component which has a direct impact on increasing the useful life and operational reliability of electronic products. It is worth remembering that today, the components used are much more complex than they were a decade ago and, at the assembly level, the process has also evolved. Hence, the coating process is an increasingly important production step.

The coating process can be applied to various surfaces of cars, motorbikes, boats, etc. Not only applied to painting as it may seem obvious, but it also applies to tires, plastics, glass, headlights, hoods for convertibles, and even leather. The scope of application is very broad.

Stages in the Coating Process

Generally, the coating process can be divided into three main steps: surface preparation, application process, treatment, and equipment cleaning.

coating prosess
coating prosess

1. Surface Preparation

While basically every step is important to ensure an optimal finish, proper surface preparation is essential to ensure the success of the process. In fact, almost all coating adhesion failures are directly related to sub optimal surface preparation.

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In this step, various methods are used to remove soil or other imperfections from the substrate, creating a well-bonded surface. This impurities are usually in the form of oil that comes from a mechanical process or oil that is deliberately applied for temporary storage or shipping. Other contaminants usually include oxidation, rust, corrosion, scaling, stains, and dirt. In some cases, the old paint must also be removed before the new coat is applied. Water purifier is used more often nowadays.

2. Coating application

After surface preparation, the coating material is applied to the substrate using various methods. Coatings are usually applied in several layers, starting with the main layer followed by the next layer (base or top layer) and the final layer (clear layer).

The following methods are widely used:

  • Dip coating
    The object to be coated is immersed in the paint tank and the remaining paint is allowed to drip
  • Roller
    The paint or coating material is spread over an even area
  • Electrodeposition
    A part is coated by making it anodic or cathodic in a bath which is generally an aqueous coating emulsion
  • Spray Process
    As the name implies, the coating material is sprayed from the gun onto an object.

3. Curing (preservation)

After the material is applied, the curing process is carried out so that the coating becomes hard, tough, and adheres perfectly. Coating is carried out by chemical reactions or resin polymerization. The mechanisms for initiating the curing process generally include oxidation to ambient temperature, chemical reactions with other components or roasting in an oven.

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4. Equipment Cleaning

The final stage of any coating operation is cleaning of equipment, such as spray guns and hoses. This usually involves soaking, wiping or rinsing with a solvent.

Types of coating that must be known

Coatings can protect and beautify the surfaces of various objects, increasing their value – from homes and manufactured products to bridges and other structures. There are many variations of coatings, but they can generally be divided into three categories:

Coatings for Architecture

The largest segment of the paint industry produces architectural coatings, including consumer paints. Architectural coatings are the type of coating that is produced the most each year. This product is used to beautify and treat the surfaces of homes, public buildings, offices, and factories. About half are applied by consumers who like “do-it-yourself” things considering paint is the most versatile, cheapest and easiest to use of all home decor products.

Industry Coating

Pipe Coating
Pipe Coating

This coating is applied when manufacturing an original product from a factory or original equipment manufacturer. Its applications are also varied, ranging from auto parts in general, metal surfaces in general, metalworking industry, industrial building construction and maintenance, automotive finishing or repainting, to architectural in general.

Special Coatings

This industry segment includes a variety of different layers. One of its characteristics is that these coatings tend to be applied in the field, not in production in factories. One example is the use of paint on roads, parking lots, and airport surfaces.

Pros and Cons of Coating

Apart from its very useful function for various devices or objects, the coating process also has several drawbacks. Here are the advantages and disadvantages of the coating process:

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Pros of Coating

  • High resistance
    Usually they reject chemicals from almost any ordinary PH, so that their color and gloss can last.
  • Dust proof
    The coating properties are usually excellent at repelling water and dust. Therefore, an object that is coated will stay clean longer than without maintenance. Even when washing, cleaning is easier because dirt doesn’t stick to the surface.
  • High durability
    It is estimated that between 1 and 2 years depending on the product used, number of layers, etc.
  • Glossy finish
    The end result is visibly more beautiful, and more durable.
  • Anti-scratch
    Its resilience and hardness make it less prone to scratching.

Cons of Coating

  • Skilled workers and special equipment are required
    For some types of coatings, the process requires special expertise or tools. If not done properly or professionally, it can look bad and reduce functionality.
  • Application may take a while
    Given the ample process with a long drying time, the final result can really show up after a while.
  • Material costs
    In some processes, the cost is arguably high because the material or coating material is quite high.

That’s an explanation of the coating process. Coating itself will still continue to be used along with technological developments considering this process can make various devices more durable. Visit here to see the coating checklist inspection. Keep occupational health and safety a priority.

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About the Author: Andres Ina Rivai

Good work is always to follow good and precise procedures. Don't forget that safety and health at work are always the top priority

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