Renault D47 1165 Accelerated Aging - Product Applied for Bonding, Sealing, Anti-Fouling, Damping, Anti-Corrosion and Protection Functions

The standard "Renault D47 1165 Accelerated Aging - Product Applied for Bonding, Sealing, Antifouling, Damping, Anticorrosion, and Protective Functions," developed by the French automobile company Renault, describes a test method for exposing a product to various environmental conditions (climatic or chemical - single, combined, or cyclic). This standard also specifies how these conditions affect specific properties of exposed parts and products. Test results do not represent the product's behavior under actual operating conditions, except after applying correlations on a case-by-case basis.

The principle of this standard is to define for each application the ageing conditions that best reflect natural exposure in terms of temperature, humidity, corrosion or liquid presence.

Equipment used in these tests includes:

• Chamber conditioned to 23 degrees plus/minus 2 degrees temperature and 50 percent plus/minus 5 percent relative humidity.
• Dry heat ventilated chamber adjustable between 20 degrees and 200 degrees with an accuracy of plus/minus 2 degrees.
• Adjustable chamber for relative humidity and temperature, has the following parts:
  • A device that measures relative humidity with 5 percent accuracy
  • A device that measures temperature with an accuracy of 1 degree.
• Cold chamber adjustable from minus 40 degrees to plus/minus 3 degrees.
• Climatic chamber with automatic temperature and humidity control and can be used to perform repetitive climate cycles according to the schemes given in the annexes of the standard.
• Water immersion chamber.
• Glass jars with waterproof rubber seal lids.
• For example, 120 µm and 100 g/m² polyethylene bags.
• Heating tongs for melting polyethylene.
• Cotton wool.

Test samples are prepared according to the test method instructions for each product to be examined. Samples are placed in the conditioned chamber for at least 24 hours before being subjected to various aging conditions.

Test samples are exposed to environmental conditions according to the aging method selected and defined in accordance with this standard.

• For atmospheric conditions, Annex 1 applies. Expose to the free state or wet poultice according to the instructions in Annex 3.
• Liquids are placed in jars that are 4/5 full and hermetically sealed. A jar is used for each product.

After exposing the test sample to environmental conditions and subsequently placing it in the chamber, the retained properties are determined according to the relevant test method:

• Unless otherwise specified in normative documents, a minimum of 2 hours and a maximum of 4 hours for wet samples.
• For other samples, at least 24 hours.

If different types of ageing procedures than those described in this test method need to be applied, the French standard NF EN 29 142 should be consulted.

In addition to the results obtained, all visible changes during the aging test are recorded before and after the destructive test, and all observations made on the test samples before aging are noted. This is done to prevent manufacturing defects in the test samples from being attributed to aging conditions.

For control purposes, it is recommended to keep a set of reference test samples in the conditioned chamber.

The results obtained for measurable properties are expressed as follows:

• In absolute values
• Or as relative changes relative to the initial value.

For unmeasured properties, specify the nature of the observed changes, such as a break between the backing and adhesive, or cohesive failure in the adhesive joint due to partial or complete corrosion of the backing. It is recommended to verify that changes in the measured properties are solely due to accelerated aging testing. The following three values ​​should be used for this purpose:

• A: Characteristic value measured before accelerated aging test.
• B: Characteristic value measured on the reference test sample subjected to internal aging conditions of 23 degrees plus/minus 2 degrees temperature and 50 percent relative humidity
• C: Characteristic value after accelerated aging test.

In short, the Renault D47 1165 standard is a standardized test procedure designed for the automotive industry to evaluate the resistance of automotive materials, such as adhesives, coatings, sealants, and paints, to prolonged exposure to moisture, heat, and pressure under simulated environmental stress. The test simulates the harsh environmental conditions that vehicle components may encounter throughout their life cycle, particularly climates with high humidity or frequent condensation.

It involves a "wet wrap" aging process in which samples are subjected to high humidity, temperature changes, and pressure to simulate prolonged exposure to moisture and condensation during vehicle assembly or use. This is a specific type of procedure that typically involves high temperatures (e.g., 70 degrees) and extended periods (e.g., 7-14 days). Wet wrap refers to a wet wrap applied to the test sample, simulating moisture trapping in real-world scenarios, such as water accumulation in vehicle crevices or interior condensation. This method ensures that materials can withstand aggressive environmental stress without deteriorating, peeling, or losing their adhesion.

This standard is primarily designed for quality assurance in Renault vehicle production, including bodywork, interior components and paint systems, and is part of the wider Renault D47 series of materials testing standards.

This standard is used as a reference in supplier compliance, laboratory testing and certification processes for Renault parts.

The primary purpose of the Renault D47 1165 standard is to assess the long-term durability of materials under conditions reflecting real-world challenges. Key applications include:

• Adhesive testing: Evaluation of the bonding strength of adhesives used in vehicle assembly, such as flooring, panels or glass.
• Coating and paint durability: Ensuring that the paint and protective coatings on the bodywork resist blistering, cracking or delamination when exposed to moisture.
• Sealing performance: Verify that seals and gaskets maintain their integrity in humid or wet environments, preventing leakage or corrosion.
• Interior components: Testing the resistance of materials such as dashboard plastics, upholstery or carpet to moisture-induced deterioration.

This standard is critical to Renault's quality assurance processes, ensuring that components meet stringent performance criteria before they are integrated into vehicles.

The Renault D47 1165 test involves a controlled procedure for stress testing materials. The general methodology includes:

• Sample preparation: Test samples (e.g. coated panels, adhesive joints or sealed assemblies) are prepared according to Renault guidelines.
• Cataplasm Application: A wet blanket, usually a layer of cotton or textile soaked in water, is applied to the sample to simulate moisture trapping. The blanket is then sealed to maintain constant humidity.
• Environmental exposure: Wrapped samples are placed in a climate chamber set to specific conditions, such as 70 degrees, for a specified period of time (usually 7 or 14 days, depending on the material and requirements).
• Post-test evaluation: After exposure, samples are examined for signs of deterioration such as:
  • Loss of adhesion (e.g. peeling or delamination).
  • Visual defects (e.g. blistering, discoloration or cracking).
  • Changes in mechanical properties (e.g. reduction in tensile strength).
• Compliance check: The results are compared with Renault's acceptance criteria to determine if the material complies with the acceptance criteria.

Testing replicates worst-case scenarios to ensure materials can withstand extreme conditions without compromising vehicle safety or aesthetics.

As a result, the Renault D47 1165 standard is a cornerstone of the automaker's quality assurance framework, ensuring vehicle components can withstand the rigors of humidity, heat, and time. By simulating real-world environmental challenges, the standard helps Renault deliver durable, safe, and visually appealing vehicles. For suppliers, mastering D47 1165 compliance is essential to securing contracts and contributing to Renault's reputation for quality.

Our organization, which has been serving for many years and meticulously following global developments in science and technology, employs a skilled team and extensive infrastructure to conduct testing, measurement, and analysis in a wide range of areas for businesses across all sectors. In this context, we also provide testing services in accordance with the Renault D47 1165 Accelerated Aging - Product Applied for Bonding, Sealing, Anti-Fouling, Damping, Anti-Corrosion, and Protective Functions standard.