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Evaluation of Industrial Coatings at TCR

  • Writer: Rohit Bafna
    Rohit Bafna
  • Sep 8
  • 2 min read

At TCR Engineering’s state-of-the-art materials testing laboratory in Mahape, Navi Mumbai, coatings applied to critical industrial components undergo rigorous evaluation as per globally recognized standards. Our testing protocols ensure that protective coatings used in high-performance environments — such as fasteners, valves, automotive systems, and oil & gas infrastructure — meet stringent quality benchmarks for reliability, adhesion, and durability.


TCR Engineering provides in-depth analysis of industrial coatings — including surface quality, film thickness, and adhesion strength — guided by ASTM and ISO standards. While curing assessment is outside our testing scope, our comprehensive evaluations play a vital role in qualifying coatings for mission-critical applications.

⚠ Note: TCR Engineering does not undertake curing tests for coatings. Clients are advised to validate curing processes at the application or manufacturing site.

1. Visual Surface Quality Inspection

Visual inspection is the first step in evaluating coating integrity. At TCR, we assess coated surfaces to verify the absence of surface discontinuities such as pinholes, blisters, bubbles, runs, sags, or holidays. This inspection is conducted in accordance with:

  • ASTM D714 – Evaluating Degree of Blistering

  • ASTM D610 – Evaluating Degree of Rusting

  • ASTM D660/D661 – Checking for Cracking and Checking

  • SSPC-PA 1 – Paint Application Specification


The surface is examined under suitable lighting using magnification (typically 5x) to detect micro-defects.


2. Coating Thickness Measurement

Accurate film thickness is critical for ensuring the expected barrier and mechanical properties. TCR performs both non-destructive and destructive film thickness evaluations:

  • ASTM D7091 – Non-Destructive Measurement Using Magnetic and Eddy Current Gages

  • ISO 2808 – Determination of Dry Film Thickness


Calibrated gauges suited for both ferrous and non-ferrous substrates are used to maintain high precision.


3. Adhesion Testing

Adhesion strength is key to coating performance under mechanical and environmental loads. TCR employs both tape and pull-off testing methods:

  • ASTM D3359 – Cross-Cut Tape Test

  • ASTM D4541 – Pull-Off Strength Using Portable Testers

  • ISO 2409 – Paint and Varnish Cross-Cut Test


These methods ensure coatings are fit for long-term use in aggressive operating conditions.


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