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Epoxy Intumescent Fireproof Coating for Steel Structures

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Industrial Anticorrosive Coating

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Product Features

Solvent-free epoxy intumescent coating WHP1109 is a high-build, solvent-free, two-component coating with excellent durability, corrosion and fire protection.
Good chemical stability: acid resistance, alkali resistance and salt spray corrosion resistance are up to the standard, and the coating has no delamination, peeling and cracking in outdoor chemical environments such as slight industrial corrosion and coastal salt spray, and is suitable for various outdoor use scenarios.
Stable product quality: the key raw materials for production (ammonium polyphosphate, pentaerythritol, epoxy resin, etc.) have clear parameter requirements, the production process is standardized, the product consistency verification conclusion is consistent, and the batch quality is controllable.

Construction Method

All surfaces to be coated shall be clean, dry and free of contaminants

[1] Carbon steel substrate

Substrates shall be blast cleaned to Sa2 (ISO 8501-1: 2007) or SSPC SP6 and primed surfaces. Blast cleaning to Sa 2.5 (ISO 8501-1: 2007) or SSPC SP10.

[2] Galvanized substrates

Ideally, galvanized substrates shall be sand swept to near Sa1 grade (ISO8501-1: 2007) or SSPC-SP16.

[3] Primer

The preferred primer shall be an epoxy polyamide coating or an epoxy zinc phosphate coating not exceeding 75 um in thickness. For surfacer systems, such as zinc epoxy coatings and transition coats, the total dry film thickness shall not exceed 110.

[4] Construction process

If a modified airless sprayer is used, first thoroughly mix a set of WHP1109 coating with a power tool. Each mix shall be stored at 21-27 ° C for 24 hours prior to use and thoroughly stirred prior to mixing. Mixing ratio, component A: component B 4:1. Mixed service life, use up within 90 minutes.

[5] Multi-component airless spraying

Recommended and preferred equipment (suitable for high-viscosity two-component spraying equipment with fibers)
Wipe: Usually diluted with 5% thinner.

[6] During the construction and drying period, the ambient temperature shall be above 10 ℃ as far as possible, the relative humidity shall be lower than 85, the substrate temperature shall be above 5 ℃, and the ventilation shall be good.

[7] Job Pause

Do not leave paint in the paint tube, spray gun, or spray equipment. Rinse all equipment thoroughly with matching thinner. Paint shall not be re-encapsulated after mixing. If the work is suspended for a long time, it is recommended to use the newly prepared paint when restarting the work.

Performance Indicators

Test item	Performance indicators
Bond strength (MPa)	2.09
Heat exposure resistance	The coating is normal, and the attenuation of thermal insulation efficiency is 3.5%.
Resistance to moisture and heat	The coating is normal, and the attenuation of thermal insulation efficiency is 3.5%.
Freeze-thaw cycle resistance	The coating is normal, and the attenuation of thermal insulation efficiency is 8.8%.
Acid resistance	The coating is normal, and the attenuation of thermal insulation efficiency is 5.3%.
Alkali resistance	The coating is normal, and the attenuation of thermal insulation efficiency is 3.5%.
Salt spray corrosion resistance	The coating is normal, and the attenuation of thermal insulation efficiency is 3.5%.
Salt spray corrosion resistance	Thermal insulation efficiency attenuation 7.0%
UV resistant	The coating shall be free from abnormality, and the thermal insulation efficiency shall be free from attenuation.