Holiday detection
Identification of pinholes, voids, holidays, and other coating discontinuities.
Protective coating integrity
Electro Spark Testing Services
Electro spark testing helps locate small discontinuities in protective coatings and linings before they become pathways for corrosion or product contamination.
Inspection done right
Reliable results for critical assets
NVI performs application-specific high-voltage holiday testing on nonconductive coatings applied over conductive substrates. The test voltage and procedure are selected around coating thickness, material, substrate, and governing project requirements.
Our technicians document detected holidays so affected areas can be repaired and retested. Electro spark testing can be coordinated with coating inspection, tank inspection, mechanical integrity, and turnaround scopes.
Capabilities
What NVI provides
Procedure-based voltage selection
Test settings established from coating type, thickness, substrate, and applicable requirements.
Repair verification
Targeted retesting after coating repairs to confirm corrected areas meet the inspection scope.
Coating inspection coordination
Integration with NACE coating inspection and broader asset integrity programs.
Field documentation
Clear identification and reporting of detected discontinuities for repair teams and owners.
Turnaround support
Flexible field deployment for tanks, vessels, piping, and lined process equipment.
Applications
Where this service is used
- Tank linings
- Coated pipe and fittings
- Pressure vessels
- Process equipment
- Protective dielectric coatings
- Fabricated lined components
Quality and compliance
Built around your requirements
NVI develops each inspection scope around the asset, operating conditions, applicable code, and client procedure. Certified technicians provide timely field communication and clear reporting so owners can make informed maintenance decisions.
Start a conversation
Need an inspection plan for your asset?
Tell us about the scope, location, schedule, and applicable requirements. NVI will help identify an efficient inspection approach.