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Qualification — Complete
Coating Evaluation
OEM-approved testing for automotive OEM paint systems, oil & gas pipeline coatings, marine & offshore protection, and industrial surface treatment. Physical properties, durability, weathering, and full OEM qualification protocols — interpreted by engineers.
Coating Physical Properties
Film Build, Adhesion, Hardness, Gloss & Color
From initial DFT measurement through pull-off adhesion, mechanical resistance, and colorimetric evaluation — a complete physical characterisation of any coating system.
| Test | Standards | Details |
|---|---|---|
| Dry Film Thickness (DFT) | ASTM D7091, SSPC-PA 2 | Magnetic induction and eddy current gauges; ferrous and non-ferrous substrates |
| Wet Film Thickness | ASTM D4414 | Notch gauge measurement during application |
| Cross-Cut Adhesion | ASTM D3359, ISO 2409 | Classification 0B–5B (ASTM) / 0–5 (ISO); tape pull assessment on scribed grid |
| Pull-Off Adhesion (Dolly Test) | ASTM D4541, ISO 4624 | Quantitative adhesion strength in MPa; cohesive vs. adhesive failure mode analysis |
| Pencil Hardness | ASTM D3363 | Wolff-Wilborn method; 6B to 9H pencil scale; pass/fail and rating |
| Scratch Hardness | — | Sclerometer; scratch resistance of cured films |
| Impact Resistance | ASTM D2794 | Direct and reverse impact; reported in inch-lbs; pass/fail crack or adhesion loss |
| Flexibility (Mandrel Bend) | ASTM D522 | Conical mandrel (Method A) and cylindrical mandrel (Method B); cracking, flaking assessment |
| Specular Gloss | ASTM D523, ISO 2813 | 20° / 60° / 85° geometry; high-gloss, semi-gloss, and matte coating characterisation |
| Color Measurement | ASTM D2244, ASTM E308 | CIE L*a*b* colorimetry; ΔE color difference; metamerism index; gloss-corrected color |
| Cup Wash / MEK Rub | ASTM D4752 | Double rub count; solvent resistance; cure verification for epoxy and other reactive coatings |
Coating thickness measurement using portable DFT gauge
Coating Durability & Environmental Resistance
Salt Spray. Weathering. Cyclic Corrosion. Chemical Resistance.
Long-duration accelerated ageing tests that predict field performance — from 5000-hour salt fog to OEM cyclic corrosion protocols and xenon arc weathering.
| Test | Standards | Details |
|---|---|---|
| Salt Spray (NSS / ASS / CASS) | ASTM B117, ISO 9227 | Neutral Salt Spray (NSS), Acetic Acid Salt Spray (ASS), Copper-Accelerated (CASS); up to 5000+ hours; creep from scribe measurement |
| Humidity Resistance | ASTM D2247, ASTM D1735 | Constant 100% RH immersion fog and Cleveland humidity cabinet; blistering, adhesion loss evaluation |
| Xenon Arc Weathering | ASTM G155 | Simulated sunlight spectrum; color retention, gloss retention, and chalking assessment per OEM weathering cycles |
| UV Accelerated Weathering | ASTM G154 | UVA-340 and UVB-313 lamp options; QUV panel; color and gloss change measurement |
| Thermal Shock / Cycling | — | −40°C to +150°C thermal cycling; coating integrity evaluation after repeated thermal excursion |
| Chemical Resistance | ASTM D1308 | Spot test and immersion; acids, alkalis, solvents, hydraulic fluids, fuels; blistering, softening, color change |
| Water Immersion | ASTM D870 | Continuous water immersion; blister resistance; post-immersion adhesion evaluation |
| Cyclic Corrosion | SAE J2334, GMW 14872 | OEM automotive cyclic corrosion protocols; humidity, salt spray, and drying cycles; scribe creep and panel rating |
CC2000ip cyclic corrosion chamber — ASTM B117 corrosion resistance
Pipeline & Industrial Coating Testing
Holiday Detection. Blast Profile. Cathodic Disbondment. Soluble Salts.
Dedicated test methods for protective coating qualification on oil & gas pipelines, structural steel, and heavy industrial equipment — covering surface preparation through in-service performance.
| Test | Standards | Details |
|---|---|---|
| Holiday / Porosity Test | ASTM D5162, NACE SP0188 | Low-voltage (wet sponge) and high-voltage holiday detection; pin-hole and void detection in pipeline coatings |
| Blast Profile / Anchor Pattern | ASTM D4417 | Method B (profile gauge) and Method C (Testex Press-O-Film replica tape); surface roughness Ra and Rz measurement |
| Conductimetric Analysis | ASTM D4940 | Soluble salt contamination on abrasive-blasted surfaces; conductivity measurement; acceptance per specification |
| Cathodic Disbondment | ASTM G8, ASTM G42, CSA Z245.20 | Resistance of pipeline coatings to disbondment under cathodic protection; disbondment radius measurement |
| Hot Water Immersion | — | Elevated-temperature water immersion for pipeline coatings; blistering and adhesion loss evaluation |
| Abrasion Resistance | ASTM D4060 (Taber) | Taber abraser with CS-17 and H-18 wheels; weight loss in mg per 1000 cycles; film wear resistance |
| Degree of Cure | ASTM D4752, DSC | MEK rub test for solvent-borne systems; DSC exotherm measurement for FBE and powder coatings; residual cure determination |
| Surface Cleanliness | ISO 8501, SSPC-SP | Visual assessment to ISO Sa 2.5 / SSPC-SP 10 Near-White Metal and other blast grades; photographic comparison |
Automotive OEM Paint Qualification
Full OEM Specification Testing for e-Coat, Primer, Basecoat & Clearcoat Systems
Complete paint system qualification against manufacturer-specific standards — from appearance and mechanical performance through chip resistance, condensation, and car-wash simulation.
OEM Specification Coverage
Full test matrix execution against OEM-specific paint standards including MS 655-10, MS 652-15, TSH 1601G, and equivalent specifications from global automotive OEMs. All results reported against pass/fail acceptance criteria.
- MS 655-10
- MS 652-15
- TSH 1601G
Chip & Gravel Resistance
Gravelometer testing per ASTM D3170 for chip resistance evaluation of exterior paint systems. Controlled stone impact at defined velocity and angle. Post-exposure adhesion assessment and rating to OEM scale (0–10).
- ASTM D3170
- Gravelometer
Condensation & Humidity
Condensation cabinet testing to evaluate moisture resistance of paint systems. Constant condensate exposure with post-test assessment for blistering, delamination, and adhesion loss — critical for underbody and engine bay coating qualification.
- ASTM D4585
- VDA 621-422
Car Wash Simulation
Repeated mechanical abrasion simulation mimicking automated car wash cycles. Pre- and post-exposure gloss, DOI (distinctness of image), and surface appearance measurement. Long-term mar and scratch resistance evaluation of clearcoat systems.
- Gloss Retention
- DOI
Stone Chip Rating
Quantitative assessment of coating damage following impact testing. Rating of chip size, density, and penetration depth to bare metal. Critical for corrosion-resistance qualification of primer and e-coat layers beneath topcoat systems.
- OEM Rating Scale
- Primer Exposure
Appearance & DOI
Wavescan and distinctness of image (DOI) measurement for surface quality assessment of Class A paint finishes. Long-wave and short-wave orange peel quantification. Instrumental appearance evaluation aligned to OEM acceptance thresholds.
- Wavescan
- DOI
- Class A Surface
Layered system testing: We qualify complete multi-layer paint stacks — e-coat through primer surfacer, basecoat, and clearcoat — against OEM specifications. Test sequences are executed in the correct order with intermediate cure steps, matching the OEM qualification protocol rather than individual layer spot-testing.
Industry Applications
Coating Systems We Qualify
From FBE pipeline coatings to automotive clearcoats and marine epoxies — every major coating system, every industry, under one roof.
Oil & Gas Pipelines
FBE (fusion-bonded epoxy), 3-layer PE (3LPE), 3-layer PP (3LPP), liquid epoxy, and coal tar enamel. Complete qualification per ISO 21809, CSA Z245.20, and project-specific pipeline specs — cathodic disbondment, holiday detection, peel strength, impact, and bending.
- FBE
- 3LPE / 3LPP
- ISO 21809
- CSA Z245.20
Automotive
Complete OEM paint system qualification — cathodic e-coat, primer surfacer, waterborne basecoat, and 2K clearcoat. OEM spec execution (MS 655-10, TSH 1601G), chip resistance, condensation, cyclic corrosion, and appearance measurement for new model introduction (NMI) approval.
- e-Coat
- Primer
- Basecoat
- Clearcoat
Marine & Offshore
Ballast tank coatings (PSPC compliance), splash zone epoxies, antifouling systems, and submerged hull coatings. Extended salt spray, humidity, cathodic disbondment, and immersion testing for marine-grade qualification. NACE and SSPC surface preparation standards.
- Ballast Tank
- Splash Zone
- PSPC
- Antifouling
Industrial
Powder coatings (thermoset and thermoplastic), liquid industrial epoxies, polyurethane topcoats, and zinc-rich primers on structural steel. Cure verification (DSC), mechanical testing, and corrosion resistance for equipment, machinery, and industrial asset protection.
- Powder Coating
- Structural Steel
- Zinc-Rich Primer
Infrastructure
Bridge coating systems (IS 13049, SSPC Paint 20), rebar epoxy coatings (ASTM A775), and protective coatings on concrete structures. Chloride permeability, adhesion, and long-duration weathering for infrastructure asset protection under Indian climatic conditions.
- Bridge Coating
- Rebar Epoxy
- ASTM A775
- IS 13049
Powder & Specialty Coatings
Thermosetting polyester and epoxy powder coatings for appliances, architectural aluminium, and automotive components. Cure (DSC exotherm), adhesion, impact, flexibility, and salt spray. Specialty coatings: PTFE, ceramic, thermal spray, and intumescent fire protection systems.
- Thermosetting Powder
- PTFE
- Intumescent
Why Microlab for Coatings
One Lab. Every Coating Parameter. Validated.
No Sample Splitting
Physical properties, corrosion exposure, and weathering all performed in-house. No custody breaks, no waiting for third-party sub-contractors.
Long-Duration Exposure Capability
Salt spray chambers available for 5000+ hour continuous runs. Dedicated xenon and UV weathering chambers for extended OEM qualification timelines.
Onsite Coating Inspection
Portable DFT gauges, holiday detectors, pull-off adhesion testers, and surface cleanliness kits for field and fabrication-yard inspection—traceable certificates.
Pipeline Coating Specialists
Experience with FBE, 3LPE/3LPP qualification to CSA Z245.20, ISO 21809-1/2/3, and project specifications for upstream and midstream pipeline projects.
Automotive OEM Experience
Familiar with the full qualification matrix of major OEMs operating in India. We execute, we do not interpret for you — results reported cleanly against each specification requirement.
Engineering Interpretation
Reports written by engineers who understand coating systems — failure mode analysis, root cause opinion, and re-test recommendations included where relevant.
Coating System Evaluation
Testing each layer of the coating system
| Layer | What We Test | Methods |
|---|---|---|
| Substrate | Surface profile, cleanliness, blast standard compliance | ISO 8501, surface roughness measurement |
| Pretreatment | Phosphate coating weight, chromate conversion, anodise thickness | Gravimetric, XRF, cross-section microscopy |
| Primer | DFT, adhesion to substrate, primer-topcoat compatibility | ASTM D4138, D4541, D3359 |
| Topcoat | DFT, gloss, colour, hardness, flexibility, chemical resistance | ASTM D523, D2244, D3363, D522, D1308 |
| Full System | Salt spray, cyclic corrosion, UV resistance, scribe creep, cathodic disbondment | ASTM B117, G85, G154, D1654, ASTM G8/G42 |
Testing by Application
Different coating applications require different test programs
Decorative Coatings
Architectural, furniture, appliances
Colour consistency (ΔE), gloss retention, scratch resistance, chemical/stain resistance, UV stability. Appearance-driven testing with accelerated weathering.
Industrial / Protective Coatings
Structural steel, pipelines, tanks
Long-duration salt spray (1000–5000 hrs), cathodic disbondment, adhesion under immersion, holiday detection. Performance-driven qualification per NORSOK, SSPC, ISO 12944.
Automotive OEM Coatings
Body panels, wheels, trim, underbody
OEM paint qualification: stone chip (ASTM D3170), car wash simulation, condensation humidity, cyclic corrosion per OEM schedules (GM, Ford, VW, Hyundai). Complete paint system evaluation.
Pipeline / Heavy-Duty Coatings
FBE, 3LPE, 3LPP, internal linings
Cathodic disbondment (G8/G42/G95), hot water immersion, flexibility at low temperature, impact resistance, adhesion after aging. CSA Z245.20/DIN 30670 compliance testing.
3–6 Days
Standard Turnaround
2–3 Days
Express Available
ISO 17025
Reports
Related Services
Corrosion Testing
SSCC, HIC, IGC, salt spray, pitting, and electrochemical corrosion evaluation
Environmental Testing
Xenon arc, UV weathering, thermal shock, and humidity cycling
Metals Testing
Mechanical, chemical, and metallographic testing of ferrous and non-ferrous metals
FE-SEM / EDS / EBSD
Nanometre-resolution imaging, elemental mapping, and crystallographic analysis
Ready to Qualify Your Coating System?
Discuss your test matrix with a coatings engineer. We will confirm scope, standards alignment, and turnaround.