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Apr 26, 2021 · Myth 3: Waterborne coatings take a very long time to dry Once again, the key to achieving a faster dry time is in the additives and formulation of the coating. “There are a few ways we can formulate to improve dry time,” says Neely.
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Do you know them well enough to ace this quiz? Read More ....
- A Waterborne DTM Coatings Quiz
Some water-borne metal coatings can be applied in a single thicker layer, but most require two or three more layers. In these cases, you need to include proper drying time in between each layer. The recommended temperature for drying depends on the specific paint.
- Fundamentals of Epoxy Systems
- Careful Design of A Water-Based Emulsion Epoxy Coating
- WB vs. SB Anti-Corrosion Coatings – A Practical Proof That ‘It Works’
Crosslinking Mechanism of Epoxies
1. The end epoxy ring 2. The side hydroxyl group 1. For a 1-pack system, the resin and curing agent can be combined well in advance of its actual application. The system will either not react at all or react very slowly at ambient temperature. After application of these 1-pack systems, when heat is applied, the curing reactions occur much faster and the final polymer is formed. 2. For a two-pack epoxy system, the resin and curing agent must be kept apart until just prior to their application....
Either the epoxy part comes as 100% solid (no solvent), in such case we speak of liquid epoxy coatings.;Or the epoxy part comes as an emulsion (micelles in water).Characteristics of Water-based Corrosion Protection Coating
1. CeTePox® 484R is a water-based emulsion of Type 1 epoxy resin supplied at 53 % solids level in mainly water, plus a small content of Methoxy Propanol. Being an emulsion, the viscosity of the product is very low (< 1500 Centipoise at 25°C), making it easy to incorporate pigment and fillers or to develop sprayable water-based coatings without having too low a solids level. The mean particle size is also less than 1.1 microns to allow good penetration and through-cure of the curing agent with...
For metal applications, the inhomogeneous distribution of pigments in the dry film can introduce channels for water and electrolytes to more easily penetrate the coatings surface, leading to acceleration of corrosion.
- Krystal Nanan
- Anodizing. Anodizing is a process used to promote the formation of a protective oxide layer on the surface of a metal. The resulting oxide layer forms more rapidly and is usually thicker than if it was produced naturally.
- Galvanizing. Galvanizing involves immersing the metal (mostly steel or iron) in a molten zinc bath. Once removed, the coated metal reacts with oxygen and carbon dioxide in the atmosphere to form a protective zinc carbonate layer.
- Electroplating. Electroplating, also known as electrodeposition, involves depositing a thin layer of one metal on the surface of another metal. During electroplating, both metals are placed in an electrolytic solution.
- Powder Coating. Powder coating, as its name implies, involves coating an object with a powder-based substance. It is an electrostatic process, whereby the coating particles are electrically charged with a polarity that is opposite to the part to be coated.
Once applied to the surface of metal, Dry Coat dries to the touch within minutes (in ambient conditions), leaving a clear, protective coating that repels water and other rust-causing substances.
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Apr 5, 2021 · Figure 6 shows how the water-based epoxy coating dries at less than half of the time of the liquid epoxy resin-based coating, thus providing additional favorable properties, such as fast ‘tack-free’ and shorter overcoat times.
