Humidity Testing Services
Humidity testing services evaluate material and product performance under controlled temperature and moisture conditions. Testing helps identify corrosion, swelling, electrical degradation, coating failure, and dimensional changes.
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- Overview
- Scope, Applications, and Benefits
- Test Process
- Specifications
- Instrumentation
- Results and Deliverables
Humidity Testing Overview
Humidity testing is a suite of environmental test methods used to evaluate how materials, components, and finished products perform when exposed to controlled levels of relative humidity, with or without accompanying temperature cycling. Humidity exposure can accelerate corrosion, moisture diffusion, hydrolytic degradation, electrical insulation breakdown, dimensional swelling, and other failure mechanisms that would otherwise take months or years to manifest under normal service conditions. By subjecting samples to constant or cyclic humidity conditions inside a controlled environmental chamber, humidity testing reproduces these degradation mechanisms in a fraction of the time.
Humidity testing is performed under a range of governing standards depending on the industry and product type, including IEC 60068-2 series methods, ASTM D2247 (100% RH condensing exposure for coatings), MIL-STD-810 Method 507, and JEDEC/semiconductor reliability methods such as 85/85 testing and highly accelerated stress testing (HAST).
Humidity Testing Scope, Applications, and Benefits
Scope
Humidity testing applies to a wide range of materials and products, including:
- Electronic components and assemblies – printed circuit boards, semiconductor packages, and connectors evaluated for moisture-induced electrical degradation
- Coatings, paints, and finishes – evaluated for blistering, adhesion loss, and corrosion under condensing humidity
- Plastics, polymers, and composites – evaluated for swelling, hydrolytic degradation, and dimensional stability
- Metals and metal finishes – evaluated for corrosion resistance under humid and condensing conditions
- Packaged consumer and industrial products – evaluated for overall performance and seal integrity under humid storage or transport conditions
Applications
- Electronics reliability qualification – constant humidity, cyclic humidity, temperature-humidity-bias (THB/85-85), and HAST testing to assess long-term reliability of non-hermetic devices
- Coating and finish qualification – condensing humidity exposure per ASTM D2247 to evaluate blistering, rusting, and adhesion loss
- Product design validation – confirming that seals, enclosures, and materials maintain performance in humid climates and tropical service environments
- Packaging and shipping qualification – evaluating product and packaging performance under humid storage and transit conditions
- Corrosion and material degradation studies – assessing susceptibility of metals, coatings, and composites to moisture-driven degradation mechanisms
Benefits
- Accelerated failure detection – controlled humidity exposure compresses long-term field degradation into a manageable laboratory test duration
- Broad standards coverage – testing can be performed to IEC, ASTM, MIL-STD, and JEDEC methods, supporting cross-industry qualification requirements
- Combined stress capability – humidity can be combined with temperature cycling, bias voltage, or vibration to replicate complex real-world stress conditions
- Applicable across material and product types – the same general chamber-based approach supports electronics, coatings, polymers, metals, and packaged goods
- Supports root cause and design improvement – identifies moisture-related failure modes early in the design or qualification cycle, reducing field failure risk
Humidity Testing Process
Sample Preparation
Prepare and condition specimens according to the applicable standard, including baseline measurements.
1Chamber Setup
Set the required temperature, humidity level, exposure duration, and test cycle.
2Humidity Exposure
Expose specimens under controlled conditions and perform interim inspections as required.
3Evaluation and Reporting
Assess corrosion, blistering, dimensional change, or performance degradation, and document the results.
4Humidity Testing Technical Specifications
| Parameter | Details |
|---|---|
| Applicable Materials | Electronics/PCBs, coatings, polymers, metals, packaged products |
| Typical Constant Humidity Condition | 85°C / 85% RH (electronics reliability) or 38°C / 100% RH condensing (coatings, ASTM D2247) |
| Typical Cyclic Profile | Alternating high/low temperature-humidity cycles with condensation and drying phases |
| Result Parameters | Visual degradation (corrosion, blistering, adhesion loss), electrical parameter drift, dimensional change, mechanical property retention |
| Test Duration | Ranges from 24 hours (short screening) to 1,000+ hours (long-term reliability qualification) |
Instrumentation Used for Humidity Testing
- Environmental chamber with independent temperature and humidity control
- Humidity and temperature data loggers/probes for continuous chamber condition verification
- Bias power supply and monitoring equipment, where combined temperature-humidity-bias (THB) testing is required
- Electrical test equipment (multimeter, LCR meter, parametric analyzer) for pre- and post-exposure electrical measurement
- Optical microscope or visual inspection station for corrosion, blistering, and surface degradation assessment
- Mechanical test equipment, where post-exposure mechanical property retention is evaluated
Humidity Testing Results and Deliverables
- Test report – documentation of the governing standard applied, chamber conditions maintained, exposure duration, and sample identification
- Degradation assessment – visual and/or quantitative documentation of corrosion, blistering, adhesion loss, or other observed failure modes
- Electrical performance data – pre- and post-exposure electrical measurements and calculated parameter drift, where applicable
- Pass/fail determination – compliance assessment against acceptance criteria defined in the governing standard or product specification
- Comparative analysis – side-by-side performance comparison across multiple samples, materials, or design revisions tested under identical humidity conditions
Frequently Asked Questions
Specimens are placed inside an environmental chamber with controlled temperature and relative humidity. They may be exposed to constant humidity or repeated damp-and-dry cycles for a specified period.
Steady-state testing maintains constant temperature and humidity throughout the exposure. It is used to evaluate long-term moisture resistance under stable environmental conditions.
Cyclic humidity testing repeatedly changes temperature and relative humidity to simulate real-world environmental variations. It can reveal condensation, corrosion, cracking and seal failure.
Testing may identify rust, blistering, swelling, warping, adhesive failure and coating delamination. Electronic products may experience short circuits, insulation loss, leakage current or functional instability.
Relative humidity, temperature, exposure duration, condensation and specimen orientation can influence performance. Chamber uniformity, surface preparation and operating condition must also be controlled.
Why Choose Infinita Lab for Advanced Materials Testing and Characterization?
At the core of this breadth is our network of 2,000+ accredited laboratories across the USA, offering access to over 10,000 testing methods and analytical services. From advanced materials characterization (SEM, TEM, RBS, XPS) to mechanical, chemical, environmental, biological, and standardized ASTM/ISO-compliant testing, we deliver unmatched flexibility, specialization, and scale. You are never limited by geography, facility, or methodology — Infinita Lab connects you to the right expertise and testing solution, every time.
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Send query us at hello@infinitalab.com or call us at (888) 878-3090 to learn more about our services and how we can support you.
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