An analysis published by marine engineer Michail Kvasnikov and reported by Shipping and Freight Resource highlights the impact that the paint used on tanker decks can have, particularly on the transport of crude oil. According to his explanation, the color and properties of the coating directly influence the temperature reached by the deck during navigation, which in turn can affect evaporation losses inside the tanks.
Kvasnikov points out that many ships continue to operate with paint systems installed decades ago, without considering that this factor can lead to significant losses. In the case of VLCCs, it is estimated that between 200 and 300 cubic meters of crude oil can evaporate during a long voyage due to the increase in temperature in the tanks, which increases the vapor pressure and, with it, the ventilation of the system.
The analysis details the thermal behavior associated with different paint colors. Dark shades, such as the green traditionally used on decks, tend to absorb large amounts of heat, reaching temperatures between 70°C and 80°C under conditions of high solar radiation. Colors such as rust red or brown represent marginal improvements, as they also maintain high heat absorption.
The lightest variations show different results. Light gray can reduce the roof temperature by between 10°C and 15°C compared to dark colors, while very light shades or off-white generate reductions of between 20°C and 25°C. According to the engineer, the greatest thermal reductions are observed with modern reflective or ceramic coatings, which can lower the surface temperature by between 25°C and 30°C or more. Although their initial cost is higher, he argues that the investment can be quickly recouped due to reduced evaporation losses, especially on large-capacity vessels.
The assessment emphasizes that the choice of paint is not only an aesthetic or maintenance decision, but an operational element that can contribute to transport efficiency, safety, and the reduction of emissions linked to evaporation management.
News and image obtained: "Mundo Marítimo"
https://www.mundomaritimo.cl/noticias/pintura-de-cubierta-y-eficiencia-operativa-como-el-color-influye-en-las-perdidas-de-carga-en-tanqueros
