I. Importance of Actual Coating Efficiency

Actual coating efficiency is crucial for owners, contractors, and coating suppliers as it involves the precise calculation of coating consumption and cost control. The actual coating efficiency takes into account losses during the application process, providing more realistic data on coating usage.

II. Calculation Formula for Actual Coating Efficiency

The calculation formula for actual coating efficiency is as follows: Actual Coating Efficiency = Theoretical Coating Efficiency × (1 − Loss Rate)

Once the theoretical coating efficiency is calculated and the loss percentage is estimated, the actual coating efficiency can be determined.

III. Factors Affecting the Loss Rate

In practical applications, the loss percentage cannot be accurately determined as it is influenced by several factors, including:

Application method and equipment

Worker's experience

Structure, shape, and space of the substrate

Surface roughness

Application environment (wind speed, height, etc.)

Coating system

IV. Example Calculation of Actual Coating Efficiency

For example, consider a coating material with a volume solids content of 60%, and a dry film thickness of 80μm. The loss is approximately 35%, and the theoretical coating efficiency is 8㎡/L. We can calculate the actual coating efficiency:

Actual Coating Efficiency = 8㎡/L × (1 − 0.35) = 5.2㎡/L

Conclusion: The actual coating efficiency for this material is 5.2㎡/L.

V. Conclusion

By calculating the actual coating efficiency, the amount of coating material used can be more accurately predicted, optimizing coating usage, reducing waste, and controlling costs more effectively. Understanding the factors affecting the loss rate is crucial for accurately calculating the actual coating efficiency.