ASTM D713

Introducing ASTM D713 – Industrial Physics

ASTM D713 is the standard test method for measuring the wet‑film thickness of organic coatings using a notch‑type gauge. This method provides a quick, reliable way to verify that coatings are applied at the correct thickness before curing — a critical factor in achieving proper coverage, adhesion, durability, and long‑term protective performance.

Wet‑film thickness control is essential in industries where coating performance directly affects corrosion protection, appearance, and regulatory compliance.

What ASTM D713 Covers

ASTM D713 defines a straightforward procedure for determining wet‑film thickness during coating application. Key elements include:

• Using a notched wet‑film thickness gauge with calibrated steps
• Placing the gauge perpendicular to the freshly coated surface
• Reading the highest wetted step to determine film thickness
• Taking measurements immediately after application
• Reporting thickness in micrometres (µm) or mils

The method applies to:

• Protective and marine coatings
• Architectural paints
• Industrial coatings and linings
• Coatings applied by brush, roller, or spray

ASTM D713 ensures consistent, accurate wet‑film‑thickness measurement across applicators, inspectors, and job sites.

Where ASTM D713 Is Used

This standard is widely used across industries where coating performance is critical:

• Protective‑coatings and corrosion‑control operations
• Marine and offshore structures
• Oil and gas equipment
• Structural steel fabrication
• Industrial maintenance and refurbishment
• Architectural and commercial painting

It supports both field inspection and in‑process quality control.

Why Wet‑Film‑Thickness Testing Matters

Understanding wet‑film thickness is essential for:

• Ensuring proper dry‑film thickness (DFT) after curing
• Achieving specified coating performance
• Preventing premature coating failure
• Controlling material usage and application efficiency
• Meeting industry, regulatory, and customer specifications

Wet‑film measurement is a foundational step in any coating‑application workflow.

Testing solutions for ASTM D713

One product from the Industrial Physics portfolio aligns directly with ASTM D713’s focus on wet‑film‑thickness measurement:

Wet Film Thickness Gauge – Stainless Steel

A durable, corrosion‑resistant notched gauge designed for fast, accurate measurement of wet‑film thickness during coating application. Its precision‑machined steps and robust stainless‑steel construction make it ideal for ASTM D713 workflows in industrial, marine, and protective‑coatings environments.

Your Global Test and Measurement Partner for ASTM D713

Industrial Physics supports coating inspectors, applicators, and quality‑control teams with the tools and expertise needed to verify coating application in line with ASTM D713. From wet‑film gauges to dry‑film‑thickness measurement and adhesion testing, we help ensure your coatings deliver long‑term protection.