Thermal Characteristics of Epoxy Fire-Retardant Coatings under Different Fire Regimes

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

This paper reports on the experimental and modeled temperature-time curves of intumescent coatings for protection of steel. The paper contains useful practical information. I recommend accept it for publication as it is.

 One small comment. Table 10. Please correct Cyrillic abbreviation to Latin.

Comments on the Quality of English Language

English is good

Author Response

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Author Response File: Author Response.pdf

Reviewer 2 Report

Comments and Suggestions for Authors

The paper presents the results of experiments of fireproof coatings on epoxy binder after simulation of liquefied hydrocarbons spill and subsequent development of hydrocarbon fire regime at the object of protection and exposure of structures to standard fire regime.According to the experimental results, the temperatures on the  samples at the end of cryogenic exposure were determined and the time from the beginning of thermal exposure to the limit state of the samples at hydrocarbon and standard temperature fire regime was determined.

The paper uses finite element modeling to solve the inverse task of heat conduction, and to determine the thermophysical properties of the formed foam coke at the end of fire tests of steel structures with intumescent coatings. It was determined that an average of 12 mm of intumescent coating thickness is required to achieve a fire protection efficiency of 120 min and for the expected impact of the hydrocarbon fire regime the coating consumption should be increased by 1.5-2 times compared to the coating consumption for the standard regime.

(1) Figure 14 should be marked with units.

(2) In line 247 “A 20x20 mm carbon fiber mesh was used on all samples, except for Sample No.3,3 where a 50x50 mm carbon fiber mesh was used. ”What is the effect of different carbon fiber mesh on fire resistance?

(3) In line 252 and 257.Why does the author calculate the formula differently?

(4) In line 259 “During the fire test under hydrocarbon and standard temperature regimes, the metal of the test samples reached the critical temperature of 500 °C as the limit state.” What is the limit temperature standard of 500 °C ?

(5) In line 314 “—the degree of blackness of the surface of the fire protection coating; ” Is it based on an empirical formula？

(6) In fact, there have been several in-depth studies on the radiation thermometry technologies in temperature measurement, such as [Fuel. 2023, 333: 126391]. However, the author does not summarize and evaluate these works, and explain the novelty of the current work.

Author Response

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Author Response File: Author Response.pdf

Round 2

Reviewer 2 Report

Comments and Suggestions for Authors

The paper can be accepted