Definition of Water-Based Industrial Paint

Water-based industrial paint primarily uses water as a diluent and does not require curing agents, thinners, or other solvents. It is a new type of environmentally friendly rust and corrosion resistant coating, distinct from oil-based industrial paint.

Features of Water-Based Industrial Paint

Water-based industrial paint has a wide range of applications, including bridges, steel structures, ships, electromechanical equipment, and steel. Its energy-saving, environmentally friendly nature, and its lack of harm or pollution to humans and the environment have made it highly popular among users, representing the future development direction of the coatings industry and a viable alternative to oil-based paint.

Applications of Water-Based Industrial Paint: Water-based industrial paint is widely used. For example, the automotive spray paint we often see is also a water-based industrial paint, as are some construction machinery, containers, rail transit, and even small items like railings and window frames.

Differences between Water-Based Industrial Paint and Ordinary Water-Based Paint

1. Resin System: Ordinary water-based paint is made with a styrene acrylic or pure acrylic emulsion resin system, mostly consisting of a single component. Industrial water-based paint systems include water-based alkyds, water-based epoxy esters, water-based epoxies, water-based acrylic polyurethanes, and various modified and combined resin systems.
2. Performance Characteristics: Ordinary water-based paints emphasize odorlessness and environmental friendliness. They are also scrub-resistant. Industrial water-based paints require higher performance, such as salt spray resistance, impact resistance, and adhesion. Because industrial water-based paints are applied over large areas, they can be applied by dipping, spraying on-site, or robotic spraying, depending on the workpiece.
3.Application Differences:

• Ordinary water-based paints coat building exteriors, wood, and general ironwork.

• Water-based industrial paints protect steel structures from corrosion and are used on containers, bridges, and mechanical equipment.

Differences between Water-Based and Oil-Based Industrial Paints

1. Environmental Performance: VOC Content: Water-based industrial paints have advantages in this regard. Using water as a solvent, they have a low VOC content and produce no irritating odor during application, making them more environmentally friendly. Oil-based industrial paint contains organic solvents that evaporate into the air during the application and drying process, directly irritating the human senses and endangering the health of construction workers. Therefore, oil-based industrial paint has a high content of volatile organic compounds (VOCs) and poor environmental performance. Prolonged ventilation is required after application.
2. Safety: Water-based industrial paint uses water instead of organic solvents during storage and transportation, making it safe and non-flammable. This significantly reduces the risks and hassles associated with production and distribution. Acetone, gasoline, and thinner contained in oil-based industrial paint are highly flammable and pose a safety hazard.
3. Convenient Renovation: Water-based industrial paint evaporates quickly, allowing for rapid surface drying and convenient, quick application. Its environmental performance also allows for immediate occupancy after application, reducing unnecessary hassles and saving time. Oil-based industrial paint, however, emits harmful fumes during the drying process, requiring extensive ventilation and detoxification after renovations or decorations. This not only pollutes the air but also evaporates incompletely, leaving residual VOCs that can be harmful to humans. Consequently, the paint must be removed from the paint for an extended period before use, which is very inconvenient.

The Difference Between Water-Based Industrial Paint and Anti-Rust Paint：

Industrial anti-rust paint has a wide range of industry and performance requirements, and these requirements are generally much higher than those for ordinary anti-rust paint.

The Difference Between Water-Based Industrial Paint and Powder Coating：

1. Compared to water-based paint, powder coating is VOC-free, theoretically achieving a 99% utilization rate, and is more environmentally friendly.
2. The thickness of a single coat of powder coating is generally 60-80 microns, which is difficult to achieve with liquid coatings. 3. Powder coatings are currently primarily applied using an electrified coating method, making them difficult to apply to all substrates, primarily metal substrates. Liquid coatings do not have this limitation.

Classification of Waterborne Industrial Paints

1. Acrylic Waterborne Anti-Rust Paint
The most common acrylic waterborne anti-rust paint is iron red acrylic waterborne anti-rust paint. This air-drying paint offers excellent adhesion, heat resistance, weather resistance, corrosion resistance, and stain resistance. It can be used with a variety of topcoats, including alkyd, amino, and nitro-based paints. In some respects, it outperforms red lead phenolic and red lead alkyd paints.
2. Alkyd Anti-Rust Paint
This paint is formulated with waterborne alkyd resin, pigments, fillers, various additives, and deionized water. Using water as the dispersion medium, it is non-flammable and non-polluting. It does not contain benzene derivatives such as toluene, ethylbenzene, and xylene, is low in VOCs, and its formaldehyde and heavy metal contents are below national standards. It has no irritating odor and is non-toxic to humans. 3. Epoxy Waterborne Anti-Rust Paint

You can use this paint as a high-performance waterborne anti-rust intermediate coat with a zinc-rich primer, or as a standalone primer for waterborne paints. You can also apply it as a sealer coat over metal spray coatings or galvanized surfaces. This paint protects steel structures from rust and corrosion in mild to severe corrosive environments, including ships, containers, offshore platforms, docks, and other marine facilities, as well as petrochemical pipelines, storage tanks, and steel structures in the metallurgical and power industries.

How to Use Waterborne Industrial Paint

Waterborne Industrial Paint Application Process: Plate Pretreatment: Shot Blasting → Surface Cleaning → Pre-primer Application → Drying → Surface Preparation → Touch-up Primer Application → Intermediate Primer Application → Drying → Waterborne Topcoat Application → Drying → Marking → Inspection.

Waterborne Industrial Paint Acceptance Methods

1. Thorough rust removal without filler or spraying.

2. Putty layer thickness no greater than 3mm (applicable to areas larger than 0.01 square meters).

3. The putty layer must be free of cracking, blistering, or flaking. 4. All edges and corners are flat, smooth, and have smooth transitions.
5. The paint layer thickness is consistent, with no delamination or cracking.
6. Rubber parts, electrical wiring, decorative components, glass, and other non-painted areas are free of oil or oil mist.
7. No mismatched colors are sprayed.
8. The chassis is clean before applying primer.
9. The gloss and texture of products within the same batch are consistent, and the color matches the drawing requirements and the color palette confirmed by the company.

Common Problems with Water-Based Industrial Paints

Paint Film Rifting

Reason 1: The base coat is not thoroughly cleaned. For example, grease or wax on the base coat is not completely removed. This causes the subsequent paint to fail to adhere due to the interlayer effect.
Reason 2: The interval between re-spraying is too short, not allowing the base coat sufficient drying time, causing water in the wet paint surface to erode the mid-coat or topcoat, softening it.
Correction Method: Sand the defective area until smooth but not broken through, then re-spray.

Sagging

Cause 1: Improper use of the spray gun. For example, low compressed air pressure, holding the spray gun too close to the surface, or moving the gun too slowly can increase the likelihood of sagging. Adjust the spray pattern and air pressure appropriately to maintain a spray distance of 20-25 cm. Maintain a consistent spray gun speed. Know the spray volume limit that causes sagging, and focus on observing the film formation while spraying.
Cause 2: The spray booth temperature is too low, preventing the paint from drying easily, or applying too thick a layer at once, slowing the paint drying process.
Correction Method: For minor sagging, wet-sand the affected area with fine sandpaper after the paint film has dried. For severe sagging, sand the affected area and then repaint.

Yellow Rust

1: The metal surface being painted is already severely rusted and damp.
2: Rust spots can also appear if the paint is left to dry for too long.

3: Rust spots can also occur if the paint is applied too thickly and the surface drying is slow. Excessive dilution of the paint with water, which slows the evaporation of the water, can also cause rust spots.

Remedy: Low ambient temperatures or high humidity during rainy days can lead to slow drying and can also cause flash rust. During application, minimize dilution of the paint and ensure adequate ventilation to maximize drying speed. Avoid application on rainy days.

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