The Importance of the Construction Environment for Thin-Film Steel Structure Fireproof Coatings
2026-04-07
How important is the construction environment for thin-type steel structure fireproof coatings in determining the coating’s performance? Now, let the editor of Henan Huiquan Industrial Co., Ltd. discuss this with you:
Suitable climatic conditions for application are as follows: During and after coating, but before the film has dried and cured, the ambient temperature should be between 5°C and 50°C, with relative humidity no greater than 90%, and adequate air circulation. Temperatures that are too low or too high, as well as wind speeds exceeding 5 m/s (level 4), are unfavorable for fire‑protective coating application. Outdoor open‑air application is prohibited, and work must not proceed if condensation is present on steel members or on the surface of the fire‑protective coating. Until the applied film has fully cured, it must be protected from rain, fog, and surface condensation. Applying excessively thick coats in a single pass, or proceeding to the next coat before the previous one has dried, can lead to delamination or cracking. Dust in the air significantly affects coating performance; therefore, dust‑control measures are essential, with specific standards varying according to the type of coating. Ventilation not only impacts coating quality but also influences the safety and hygiene of the work environment.
The construction environment for thin‑type steel‑structure fire‑proof coatings in Yunnan significantly affects the coating’s performance. Generally, the work area should be well‑lit, protected from direct sunlight, maintained at appropriate temperature and humidity levels, kept clean, with moderate air movement, and equipped with favorable fire‑safety conditions. In addition to adequate illumination, the site must be shielded from direct solar exposure; working under intense sunlight can easily lead to defects in the coating film. Atmospheric temperature and humidity have a substantial impact on both the application process and the drying characteristics of the coating.
Experiments on thin‑type steel‑structure fire‑protective coatings have shown that, under conditions of high temperature and high humidity, certain components in the coating can gradually undergo chemical reactions, leading to embrittlement of the coating film and subsequent cracking and delamination. In general, when the ambient temperature is below 5°C or exceeds 50°C, or when the relative humidity is above 85%, the coating’s performance during application tends to be suboptimal.
Latest News