Measurement standards for optically active coatings to improve shipboard tank preservation

Abstract

The cost of corrosion control to the Department of Defense (DOD) is estimated to be $20B/yr. Eliminating coating defects during the coating application job is the key to extending coating service life. Fluorescent coatings containing additives that fluoresce under violet light are commercially available. NAVSEA requires a specification and test method for this fluorescent coating so that it can be specified in Navy coating contracts. The objective of the present work is to develop a tolerance budget so ASTM committee E12 on Color and Appearance had the knowledge to develop an ASTM test method characterizing the fluorescent optical property. Presented is the measurement equation, the experimental and simulation details, along with the analysis to determine sensitivity coefficients to develop a tolerance budget.

Keywords:

• luminance ratio
• optically active coatings
• tolerances
• uncertainty budget

Acknowledgements

The authors would like to acknowledge the contributions from the ASTM E12 committee on Color and Appearance. In addition, the authors would like to thank the Coordination Calibration Group for their financial support.