Daimler PBODC 371 Chemical Resistance

Developed by the Daimler-Benz automotive company, the “Daimler PBODC 371 Chemical Resistance” standard is an automotive material testing specification focusing on chemical resistance testing for components and surfaces used in vehicles. This standard is widely referenced in validation programs for plastics, coatings, upholstery, and automotive interior and exterior materials.

This standard generally evaluates how materials react after being exposed to the following chemicals:

• Gasoline or diesel fuel
• Engine oil
• Brake fluid
• Coolants
• Cleaning products
• Alcohol-based disinfectants
• Acids and alkalis
• Indoor cleaning chemicals
• Sweat, sunscreen, or cosmetic products
• Environmental pollutants such as road salt and acid rain.

During testing, the material is examined for issues such as the following following exposure:

• color change
• Loss of brightness
• Swelling
• Cracking
• Softening
• Loss of adhesion
• Peeling of coatings
• Reduced strength
• Mechanical failure

A material is considered chemically resistant if it retains its appearance and performance.

The described test method generally follows these steps:

• Applying a specified chemical to the test sample.
• Exposure under controlled temperature and humidity.
• A specific contact time or cyclical exposure
• Visual and mechanical inspection afterwards.

This specification is often used in automotive qualification programs, along with other original equipment manufacturer durability standards.

This standard generally includes a procedure for the following:

• Automotive plastics
• Coated surfaces
• Decorative coatings
• Polymer compounds
• Interior components

This standard is primarily used in the following situations:

• Supplier approval
• Material verification
• Production exit test
• Failure analysis

Chemical resistance is the ability of a material to withstand contact with chemicals without being damaged or significantly altered. Automotive standards like PBODC 371 ensure that a material can withstand exposure to substances it might encounter during vehicle use.

The Daimler PBODC 371 standard is necessary because automotive materials must remain safe, durable, and visually acceptable throughout the life of a vehicle, despite continuous chemical exposure. For manufacturers like the Mercedes-Benz Group, chemical resistance standards help ensure that each approved material performs consistently in real-world conditions.

The main reasons why this standard is considered necessary are as follows:

• Preventing material failure: Vehicle parts are exposed to many aggressive chemicals:
  • Fuel spills
  • Cleaning agents
  • Oils and lubricants
  • Sunscreen and cosmetic products
  • Road salt
  • Battery fluids

In this situation, materials can crack, fade, become sticky, lose strength, or separate into layers. This standard helps identify weak materials before production.

• Ensuring long-term durability: Vehicles are expected to withstand various climates and operating conditions for many years. Chemical resistance tests confirm the following:
  • Maintaining the attractiveness of the interior upholstery.
  • Paints and coatings remain intact.
  • Preventing premature degradation of plastics
  • Ensuring that functional parts continue to operate safely.
• Maintaining customer satisfaction: Visible damage from chemicals can significantly impact perceived quality. Examples:
  • A dashboard damaged by hand sanitizer.
  • Door panel stained due to sunscreen.
  • Fuel splashes can damage painted surfaces.

Testing reduces warranty claims and customer complaints.

• Enhancing security: Some chemical attacks can weaken structural or functional components. For example,
  • Brake fluid can damage coatings or plastics.
  • Fuel exposure can weaken seals.
  • Battery chemicals can corrode components.

A chemically resistant material helps prevent malfunctions that could affect vehicle safety.

• Standardizing supplier quality: Automobile manufacturers source materials from numerous suppliers worldwide. Daimler PBODC 371 and similar standards ensure the following:
  • Common test conditions
  • Defined admission criteria
  • Consistent evaluation methods

This ensures that all suppliers meet the same performance requirements.

• Meeting legal and environmental requirements: Modern vehicles must meet durability and environmental expectations in global markets. Chemical resistance standards help manufacturers:
  • Verifying new sustainable materials
  • Safely handling hazardous materials.
  • Ensuring compatibility with modern fuels and cleaners.

In short, the Daimler PBODC 371 standard exists to ensure that automotive materials can withstand real-world chemical exposure without losing their appearance, function, or safety.

Chemical resistance tests help manufacturers ensure durability, safety, and long service life for interior and exterior parts. The Mercedes-Benz Group uses this standard to verify materials before approving them for vehicle production.

For many years, our organization, with its competent and experienced team, has been understanding the needs of its customers, providing the advanced testing services they require, and assisting them in the establishment, implementation, and improvement of management systems. Within this framework, we also provide testing services compliant with the Daimler PBODC 371 standard.