Fluorinated silica nanofillers were used to prepare hybrid sol–gel superhydrophobic coatings. A shot blasting technique was used to create microlevel roughness over which the sol–gel composition helped to impart a superhydrophobic behaviour. The sols were deposited on shot blasted stainless steel 304 substrates using the spray-coating technique followed by thermal curing and curing using near-infrared radiation for the first time, to study the effect of curing technique and curing time on the properties of the superhydrophobic coatings. The total curing time was 3 h for the thermal-cured samples vis-à-vis 45 min for the near-infrared radiation-cured samples. Coatings were characterized for surface roughness, water contact angles, abrasion resistance, scratch resistance, weathering resistance and corrosion resistance. Investigations were carried out to comparatively assess the coating properties of near-infrared radiation-cured coatings with those of the thermal-cured coatings. Optimized shot blasting conditions and filler quantity resulted in a highest water contact angle of 165° and a rolling angle of 5° with best possible mechanical properties. It could be seen that the thermal-cured samples exhibited slightly better properties than the near-infrared radiation-cured ones, though the difference is not substantial. Near-infrared radiation curing can be considered in place of thermal curing in order to save time and if the required scratch/abrasion resistance for end-use applications is not too high.

氟化二氧化硅纳米填料用于制备混合溶胶-凝胶超疏水性涂料。喷丸技术用于产生微观粗糙度，溶胶-凝胶组合物有助于赋予超疏水行为。使用喷涂技术将溶胶沉积在喷丸处理的不锈钢 304 基材上，然后进行热固化和首次使用近红外辐射固化，以研究固化技术和固化时间对超疏水涂层性能的影响. 热固化样品的总固化时间为 3 小时，而近红外辐射固化样品的总固化时间为 45 分钟。涂层的特征在于表面粗糙度、水接触角、耐磨性、耐划伤性、耐候性和耐腐蚀性。进行了研究以比较评估近红外辐射固化涂料与热固化涂料的涂料性能。优化的抛丸条件和填料量导致最高的水接触角为 165°，滚动角为 5°，并具有最佳机械性能。可以看出，热固化样品的性能略好于近红外辐射固化样品，但差异不大。可以考虑用近红外辐射固化代替热固化，以节省时间，并且如果最终用途应用所需的抗划伤/耐磨性不太高。优化的抛丸条件和填料量导致最高的水接触角为 165°，滚动角为 5°，并具有最佳机械性能。可以看出，热固化样品的性能略好于近红外辐射固化样品，但差异不大。如果节省最终用户应用所需的耐刮擦/耐磨性，可以考虑使用近红外辐射固化代替热固化，以节省时间。优化的抛丸条件和填料量导致最高的水接触角为 165°，滚动角为 5°，并具有最佳机械性能。可以看出，热固化样品的性能略好于近红外辐射固化样品，但差异不大。可以考虑用近红外辐射固化代替热固化，以节省时间，并且如果最终用途应用所需的抗划伤/耐磨性不太高。