ASTM B487 is the standard test method for measurement of metal and oxide coating thickness by microscopical examination of a cross section. It is used to determine coating thickness by preparing and examining a cross-sectioned sample, which helps support accurate evaluation of plated or coated surfaces. For quality control, compliance checks, and product verification, this ASTM standard provides a consistent technical basis for thickness measurement when cross-sectional analysis is the chosen approach.

ASTM B487 standard overview

The ASTM B487 standard focuses on measuring the thickness of metal and oxide coatings through microscopical examination of a cross section. Its purpose is to provide a recognized test method for evaluating coating thickness in a direct and controlled way. Because the measurement is made from a prepared section, the standard is especially relevant when precise coating assessment is needed for engineering, inspection, or acceptance activities. ASTM B487 helps create consistency in how these measurements are performed and reported.

Where is ASTM B487 used?

This standard is commonly used in laboratories, inspection departments, and manufacturing environments where coated or plated parts must be evaluated for thickness. It is relevant for metal and oxide coating systems that require cross-sectional measurement under microscopy. ASTM B487 may be applied during incoming inspection, process validation, failure analysis, or routine quality checks. It is most useful when a direct thickness reading from a prepared specimen is preferred over indirect measurement methods.

Practical importance of ASTM B487

ASTM B487 matters because coating thickness can affect performance, appearance, durability, and compliance with product requirements. A standardized microscopical method helps reduce variation in test results and supports more reliable comparisons between samples. For procurement and quality control, it provides a clear technical reference for evaluating whether a coating meets expected thickness criteria. Using ASTM B487 can also help reduce risk by improving confidence in inspection results and product acceptance decisions.

• Microscopical cross-section measurement
• Metal and oxide coating thickness
• Quality control and inspection use
• Direct evaluation of prepared specimens
• Consistent test method reference