Why do industrial paints peel off, form cracks, or lose their finish despite having an excellent finish at the time of application? This problem may actually begin before the first layer of paint even reaches the surface of the structure. Unfavourable preparation, unsuitable products, bad weather, improper technique, or some other reasons may influence the end product. For all your needs related to protective painting of steel structures, equipment, pipes, or metals in general, you should know these six things.
1. Surface Preparation Before Painting
A great paint job begins with proper cleaning of the surface. If there is any rust, grease, oil, old paint, or dust present on the surface of the metal, then the new coat will fail to adhere properly. This is the reason why abrasive blasting is performed before industrial painting. This process not only removes rust, old coating, and surface contaminants but also provides a rough surface.
The degree of surface cleanliness and roughness varies depending upon the coating system. An excessively smooth surface may pose adhesion problems, whereas an unsuitable surface profile may cause issues with coating application.
2. Selection of Paints and Coatings
Not all paints used in industry can work for all surfaces or in all conditions. The paint that can protect indoor steel equipment may not have the properties required for protecting outdoor structures, which may be exposed to moisture and chemicals.
It will depend on the location where the equipment will be installed, the type of materials used, and the conditions.
For instance, epoxy paint is widely used when chemical and corrosion resistance is required. Polyurethane finish coats can provide colour and weather resistance in appropriate coating systems. It will depend on the technical specifications of the particular project.
Make sure you have compatible primers, intermediate coats, and top coats before starting the painting.
3. Weather and Temperature During Application
Weather can affect how industrial paint spreads, dries, and bonds to a surface. This is especially important in Dubai, where outdoor steel surfaces can become very hot under direct sunlight.
High surface temperatures may cause some coatings to dry too quickly, affecting their application and finish. Humidity also matters because moisture can collect on metal surfaces even when the surface looks dry.
One important measurement is the dew point. The steel surface is commonly required to remain at least 3°C above the dew point during coating application, subject to the coating specification.
Professional painting teams should check air temperature, surface temperature, and relative humidity before and during the work rather than relying on how the weather feels.
4. Paint Application Method and Thickness
The way paint is applied affects how evenly it covers the surface. Industrial coatings may be applied using airless spray, conventional spray, brush, or roller methods, depending on the coating and project requirements.
The application method should suit the equipment, surface shape, and coating material.
Paint thickness is equally important. If the coating is too thin, it may not provide the required protection. If it is too thick, certain coatings can develop problems such as cracking, poor curing, or trapped solvent.
Dry film thickness (DFT) measurements help check whether the applied coating meets the project's specified requirements.
5. Skill and Experience of the Painting Team
Industrial painting is not only about painting the metal with paint. The crew should be knowledgeable about the surface preparation, coating blending, application conditions, and time between applications.
For instance, there are some two-component paints that need a proper ratio and specific application time after being blended. Improper application may have an impact on their performance.
Workers also should be able to paint difficult spots like welds, corners, edges, bolts, and joints. These spots can be painted with stripe coating prior to the application of the main paint layer to ensure proper coverage.
The level of quality of the work greatly depends on how well each step is done.
6. Proper Drying and Curing Time
Paint that feels dry on the surface may not be fully cured. Drying and curing are different processes, and the time required depends on the coating type, temperature, humidity, and film thickness.
Applying another coat too early can cause problems between layers. Waiting longer than the permitted recoat interval may also require additional surface preparation, depending on the coating system.
Follow the coating manufacturer's technical instructions for mixing, drying, curing, and recoating. Do not rush the process to meet a delivery deadline.
Choose the Right Team for Industrial Painting in Dubai
The quality of industrial painting depends on several connected steps. Proper blasting, suitable coating selection, controlled application, and careful inspection all play a part in protecting metal surfaces.
Planning an industrial painting project in Dubai? Contact our team to discuss your surface preparation needs, type of equipment, project conditions, and coating requirements. Whether you need protective painting for steel structures, industrial equipment, or other metal surfaces, we can help you understand the available service options. Get in touch today to discuss our Blasting Painting Services Dubai and request a quotation for your project.
