Testing service for resistance to artificial climate conditions

Testing Service for Resistance to Artificial Climate Conditions – Accredited Evaluation of Material Durability Under Simulated Weathering

For Brazilian manufacturers, importers, and quality engineers in the construction, automotive, aerospace, packaging, and outdoor equipment sectors, the ability of a material to withstand the effects of prolonged exposure to sunlight, moisture, temperature cycling, and corrosive atmospheres is a critical determinant of product durability, safety, and customer satisfaction. Brazil’s diverse climate – from the humid tropics of the Amazon to the intense UV radiation of the Northeast and the salt‑laden coastal regions – presents a unique set of environmental challenges that can accelerate material degradation, leading to discolouration, cracking, embrittlement, loss of mechanical strength, and corrosion. Our ISO/IEC 17025 accredited laboratory offers a comprehensive testing service for resistance to artificial climate conditions, which simulates the long‑term effects of environmental stressors using state‑of‑the‑art weathering chambers, including xenon‑arc weatherometers, UV fluorescent testers, salt spray chambers, and combined temperature‑humidity‑vibration systems, in full compliance with ABNT NBR, ASTM, ISO, IEC, and customer‑specific requirements. With decades of experience in accelerated weathering, corrosion testing, and materials characterisation, we provide precise, repeatable, and fully documented test results that are accepted by INMETRO, ANVISA, and Brazilian certification bodies, supporting your product approval, quality assurance, and regulatory compliance.

Materials and Products We Regularly Test

We accept a wide range of materials, components, and finished products that are exposed to outdoor or indoor climatic stress during service. Our test setups are adaptable to flat, curved, and complex specimens, and we can evaluate both raw materials and coated/painted surfaces. Common samples include:

• Polymers and plastics – thermoplastics (PE, PP, PVC, PET, PA, PC, ABS, PMMA), thermosets (epoxy, polyester, phenolic), and elastomers (rubber, silicone, EPDM).
• Coatings, paints, and varnishes – automotive, architectural, industrial, and marine coatings, as well as powder coatings.
• Textiles and nonwovens – for outdoor furniture, automotive interiors, awnings, and protective clothing.
• Composites and laminates – glass‑fibre and carbon‑fibre reinforced plastics.
• Metals and metal coatings – anodised aluminium, galvanised steel, and painted metal panels.
• Wood and wood‑based products – decking, cladding, and furniture.
• Automotive and aerospace components – exterior trim, seals, gaskets, and interior parts.
• Building materials – roofing membranes, window profiles, and façade systems.
• Solar panels and PV modules – encapsulants and backsheets.

Core Test Methods – Simulating UV, Temperature, Humidity, and Corrosive Atmospheres

Our testing service for resistance to artificial climate conditions uses a suite of standardised and customised test methods to replicate the main environmental stressors that materials face in service. The selection of methods depends on the material type, the expected service environment, and the applicable product standards:

• Xenon‑arc weathering (ISO 4892‑2, ASTM G155, ABNT NBR ISO 4892‑2) – We expose specimens to a xenon‑arc light source that simulates the full spectrum of natural sunlight, including ultraviolet (UV), visible, and infrared radiation. The test cycle includes alternating periods of light and darkness, with controlled temperature, humidity, and water spray (to simulate rainfall). This method is the most realistic simulation of outdoor sunlight exposure and is widely used for automotive, architectural, and outdoor materials.
• Fluorescent UV weathering (ASTM G154, ISO 4892‑3, ABNT NBR ISO 4892‑3) – We use UVA‑340 or UVB‑313 lamps to provide high‑intensity UV radiation in a narrow spectral band, combined with condensation cycles to simulate dew formation. This method is particularly effective for screening materials that are sensitive to UV degradation, such as plastics, coatings, and textiles, and it is often used for quality control and material comparison.
• Salt spray and cyclic corrosion testing (ASTM B117, ISO 9227, ABNT NBR 8094, and ASTM G85 – cyclic) – We expose specimens to a controlled salt fog environment (neutral, acetic acid, or copper‑accelerated) at 35°C, with or without cyclic drying and humidity phases. This simulates the corrosive effects of marine and coastal environments, which are common in many regions of Brazil. We evaluate the corrosion, blistering, adhesion loss, and other defects after the exposure.
• Damp heat and humidity testing (IEC 60068‑2‑78, ASTM D2247, ABNT NBR IEC 60068‑2‑78) – We expose specimens to a constant high‑temperature and high‑humidity environment (e.g., 40°C, 93% RH or 85°C, 85% RH) for up to 1,000 hours. This test evaluates the resistance of materials to moisture absorption, hydrolysis, and migration of additives, which are critical for electronic components, sealants, and packaging.
• Cyclic temperature and humidity testing (IEC 60068‑2‑30, ABNT NBR IEC 60068‑2‑30) – We alternate between high‑humidity (95‑100% RH) and condensation phases, with temperature cycling between 25°C and 55°C, to simulate the tropical and subtropical climate conditions typical of Brazil. This test is particularly relevant for outdoor electronics, automotive interior parts, and building materials.
• Thermal cycling and thermal shock (IEC 60068‑2‑14, ABNT NBR IEC 60068‑2‑14) – We subject specimens to rapid temperature transitions between a low and high temperature extreme (e.g., -40°C to +85°C) with transfer times of less than 10 seconds, and we repeat this for up to 500 cycles. This simulates the differential thermal expansion stresses that cause delamination, cracking, and seal failure in materials exposed to daily temperature swings.
• Combined UV and salt spray (ASTM D5894, ISO 11997‑1) – We alternate between UV/condensation exposure and salt spray cycles to simulate the combined effect of sunlight and corrosive salts, which is particularly relevant for automotive exterior parts and marine equipment.
• Ozone resistance (ASTM D1149, ISO 1431‑1) – For elastomers and rubber, we expose specimens to a controlled ozone atmosphere (e.g., 50 ppb to 200 ppb) at a defined temperature and strain, to evaluate the material’s resistance to ozone cracking.

Evaluation Criteria and Interpretation of Results

After the exposure, we perform a comprehensive assessment of the specimens to quantify the degradation and to determine whether the material meets the required performance criteria. The specific evaluation depends on the material and the application:

• Colour measurement and gloss retention (ASTM E308, ISO 11664; ASTM D523, ISO 2813) – We measure the colour difference (ΔE*) and the change in gloss (60° and 85°) to quantify the visual degradation caused by UV radiation and weathering. A ΔE* greater than 2 is typically considered visually perceptible.
• Mechanical property retention – we measure the tensile strength, elongation, impact resistance, and hardness of the exposed specimens and compare the results with unexposed controls – We calculate the percentage retention of each property, which is a direct indicator of the material’s resistance to environmental degradation.
• Visual inspection and defect classification – we examine the specimens for chalking, cracking, blistering, peeling, corrosion, and other surface defects, using standard rating scales (ASTM D714, ISO 4628, ASTM D610) – We provide high‑resolution photographic documentation.
• Adhesion testing (ISO 2409, ASTM D4541) – for coatings, we perform cross‑cut or pull‑off tests after exposure to evaluate the loss of adhesion caused by moisture and UV attack – A significant loss of adhesion indicates failure of the coating‑substrate interface.
• FTIR and DSC analysis – for polymers, we use Fourier‑transform infrared spectroscopy and differential scanning calorimetry to detect chemical changes (oxidation, chain scission, crosslinking) and changes in thermal properties (Tg, crystallinity) after exposure – This provides molecular‑level evidence of the degradation mechanisms.
• Corrosion evaluation – for metals and coated metals, we assess the extent and type of corrosion (uniform, pitting, filiform, or galvanic) using visual inspection and, if necessary, microscopy – We report the corrosion grade and the area affected.
• Pass/fail determination – we compare the measured results with the specified requirements of the product standard (e.g., automotive OEM specifications, ABNT NBR, ISO) and issue a clear pass/fail conclusion – We also provide recommendations for material improvement, surface protection, or design changes, if necessary.

Environmental and Operational Conditioning

To simulate the most realistic conditions, we can customise the test cycles to match your specific service environment, including the combination of multiple stressors:

• UV + salt spray + humidity – a sequential cycle that replicates the combined effect of sunlight, salt, and moisture, typical of coastal tropical environments – This is commonly used for automotive exterior parts and offshore equipment.
• UV + temperature cycling – we combine UV exposure with thermal cycles (e.g., -20°C to +60°C) to simulate the diurnal and seasonal temperature variations that accelerate fatigue and cracking – This is important for building materials and outdoor plastics.
• Chemical exposure + weathering – we pre‑condition specimens with a chemical agent (e.g., acid rain, cleaning agents, or fuel) and then perform the weathering test to assess the combined effect of chemical attack and UV/heat – This is relevant for industrial and automotive applications.
• Mechanical stress + weathering – we apply a constant tensile or bending stress to the specimen during the exposure, to simulate the effect of creep and stress‑cracking under environmental loads – This is used for load‑bearing plastic components and composite materials.

Compliance with Brazilian and International Standards

Our artificial climate resistance testing services support compliance with the key Brazilian and international standards for materials and products:

• ABNT NBR ISO 4892‑1/‑2/‑3 (Plastics – Methods of exposure to laboratory light sources) – The main Brazilian standards for UV and xenon‑arc weathering of plastics.
• ABNT NBR ISO 9227 (Corrosion tests in artificial atmospheres – Salt spray tests) – The Brazilian standard for salt spray and cyclic corrosion testing.
• IEC 60068‑2‑5, 60068‑2‑14, 60068‑2‑30 (Environmental testing) – International standards for temperature, humidity, and thermal cycling.
• ASTM G154, G155, G85 – widely used US standards for weathering and corrosion testing, often referenced by Brazilian importers and multinational companies – Our tests are performed according to these standards.
• INMETRO, PROCEL, and ANVISA requirements – for consumer goods, building materials, and medical devices that may be exposed to climatic conditions – Our reports are accepted for product certification and registration.
• Automotive OEM specifications – VW 80000, Fiat 7‑Z0400, GM 3172, and Ford WSS standards – which define specific weathering test profiles for components – We can customise our tests to match these specifications.

Reporting and Accreditation

All artificial climate tests are performed under our ISO/IEC 17025 accredited quality system, with full traceability of irradiance, temperature, humidity, and time measurements. Our Inmetro‑accredited reports are recognised by INMETRO, ANVISA, and various Brazilian certification bodies. Each report includes:

• A complete description of the test specimen (material, dimensions, pre‑conditioning).
• Detailed test parameters (type of light source, irradiance, cycle profiles, temperature, humidity, duration).
• Results of the visual inspection, colour and gloss measurements, mechanical property retention, and adhesion tests.
• Photographic documentation of the specimen before and after exposure.
• Any supplementary analysis (FTIR, DSC, corrosion rating).
• Comparison with the specified requirements and a clear pass/fail conclusion.
• Calibration certificates for all test equipment and measurement uncertainty statements.
• Recommendations for material or design improvement, if necessary.

Our reports provide the confidence you need to certify your products, approve suppliers, and ensure that your materials can withstand the rigours of the Brazilian climate.

Why Choose Our Artificial Climate Resistance Testing Service?

We understand that product failures caused by environmental degradation are costly and damaging to brand reputation. Our team offers rapid scheduling, flexible test programmes (from simple screening to comprehensive multi‑factor campaigns), and clear, actionable interpretation of results – we do not just give you a pass/fail; we explain the degradation mechanisms, the key factors influencing durability, and the practical steps you can take to improve your product’s resistance. We work closely with your R&D, quality, and procurement teams to design a test plan that reflects your specific service environment and regulatory requirements. With state‑of‑the‑art weathering chambers, precision measurement instruments, and a highly experienced team, our testing service for resistance to artificial climate conditions delivers the accuracy, repeatability, and regulatory acceptance you need to ensure your products are ready for the Brazilian climate. Contact us to discuss your materials and performance targets – we will develop a customised test programme that provides the definitive evidence of your product’s climatic durability.