Coating Inspection Services
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Dry Film Thickness (DFT) Measurement
At Shine Inspection Services, we specialize in precise, non-destructive Dry Film Thickness (DFT) Measurement to ensure that your coating systems meet project specifications and manufacturing guidelines. Our inspection specialists employ calibrated, high-precision magnetic and electronic DFT gauges for accurate measurements of cured coating layers on both ferrous and non-ferrous substrates. We conduct all testing, including Adhesion Testing and Cure Verification Testing, as well as statistical sampling, in strict adherence to recognized global standards such as: SSPC-PA2 (Procedure for Determining Conformance to Dry Coating Thickness Requirements) and ISO 19840 (Measurement of Thickness of Dry Films on Rough Surfaces). Whether validating single-coat applications or complex multi-layer protective coating systems, we provide reliable data and comprehensive reporting, including Holiday Detection Testing, to ensure long-term asset protection and code compliance.
Holiday / Pinhole Detection (Continuity Testing)
At Shine Inspection Services, we perform high-precision Holiday Detection Testing and Pinhole Detection (Continuity Testing) to locate invisible flaws in cured coatings before your assets go into active service. Our Cure Verification Testing ensures that coatings meet all necessary specifications for durability and performance.
Our team utilizes advanced non-destructive testing (NDT) equipment tailored to your specific coating thickness and project specifications, including Dry Film Thickness Measurement to ensure accurate assessments:
Low-Voltage Wet Sponge Testing (ASTM G6 / ISO 8289): Ideal for thin commercial and industrial coatings (typically under 500 microns). A damp sponge sweeps the surface, and water penetrates any microscopic pinholes to complete an electrical circuit, triggering an immediate audible alarm.
High-Voltage Spark Testing (NACE SP0188 / ASTM D5162): Utilized for thick industrial coatings, tank linings, and pipeline wraps. A high-voltage probe passes over the surface; if a void or defect is present, an electrical spark jumps through the gap to the steel substrate, instantly pinpointing the exact location of the flaw for repair.
Adhesion Testing
At Shine Inspection Services, we conduct definitive Adhesion Testing to evaluate the mechanical bond strength of your paint and coating systems. This ensures they can withstand harsh environmental and operational stresses without peeling or delaminating. Additionally, we perform Cure Verification Testing to confirm that the coatings have properly cured, which is crucial for their durability. Our inspectors are fully qualified to carry out both qualitative and quantitative adhesion evaluations in accordance with international standards, including Dry Film Thickness Measurement and Holiday Detection Testing.
Pull-Off Adhesion Testing (ASTM D4541 / ISO 4624) is a quantitative, destructive test where a dolly is bonded to the coating and pulled mechanically until failure. This measures the exact force required to rupture the bond in PSI or MPa, identifying whether the failure is adhesive (between layers) or cohesive (within a layer).
Tape Adhesion / Cross-Hatch Testing (ASTM D3359) is a qualitative test primarily used for coatings under 125 microns. We apply a lattice pattern cut into the coating, apply specialized pressure-sensitive tape, and evaluate the film's resistance to separation against standardized visual charts.
Cure Verification
At Shine Inspection Services, we offer comprehensive Cure Verification Testing to confirm that your industrial coatings have fully polymerized and achieved their optimal structural and chemical design strength before they are put into service.
Our inspection specialists employ standard physical and chemical testing methods to verify curing integrity both on-site and in the workshop, including Adhesion Testing and Dry Film Thickness Measurement.
Solvent Rub Testing (ASTM D4752 / ASTM D5402): Also known as the MEK (Methyl Ethyl Ketone) Rub Test, this method assesses the chemical resistance of zinc-rich primers and topcoats. By conducting a standardized number of double-rubs with a solvent-soaked cloth, we verify if the resin matrix has fully cross-linked.
Hardness Testing (Barcol / Shore Hardness): We use precision digital hardness gauges (such as Barcol or Shore D) to measure the mechanical indentation resistance of thick linings, epoxies, and structural glass-reinforced plastics, ensuring they have achieved the manufacturer's specified structural maturity. Additionally, we conduct Holiday Detection Testing to identify any coating defects that could compromise the integrity of the application.