Inhibits heat and flue gas diffusion in flame retardant epoxy coatings.

A new paper describes the heat and smoke diffusion reduced by zirconium nitridium (ZrN) in expansion flame retardant epoxy coatings.
in order to control the cooling and exhaustion of the expansion flame retardant (IFR) epoxy coating on the steel during fire, a small amount of 1 to 3 wt% zirconium nitridium (ZrN) was introduced into the coating.
Added Safety
back temperature tests showed that steel plates coated with ZrN-free IFR coating took approximately 46.1 minutes to reach 580 degrees C, but by using 3 wt% ZrN, the time was extended to 61 minutes, indicating that the steel structure could be maintained for more than 15 minutes . This may improve the safety of the steel structure because it means more escape time in the event of a fire.
addition, the ZrN-containing coating provides more control over the release of heat and flue gas. For example, a coating containing 3 wt% ZrN reduces total thermal release (THR) and smoke generation (SPR) by 20.3% compared to IFR coatings that do not contain ZrN.
paper has been published in Progress in Organic Coatings, Volume 1. 146, September 2020.
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