What is the difference between ASTM G155 and G154?

 

- Standard Title: ASTM G155 is titled "Standard Practice for Operating Xenon Arc Light Apparatus for Exposure of Non-Metallic Materials."

- Purpose: It outlines the procedures and guidelines for operating xenon arc light apparatus used to simulate sunlight exposure for non-metallic materials.

- Scope: ASTM G155 details the procedures for exposing materials to xenon arc light in laboratory conditions to assess their resistance to degradation, color change, and other properties affected by sunlight exposure.

- Application: Primarily used for assessing the durability and performance of materials such as plastics, coatings, textiles, and other non-metallic substances.

- Parameters: Provides guidelines for controlling irradiance, temperature, humidity, and other exposure conditions during testing.

 

- Standard Title: ASTM G154 is titled "Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Non-Metallic Materials."

- Purpose: It specifies the procedures and guidelines for operating fluorescent UV lamp apparatus used to simulate UV exposure for non-metallic materials.

- Scope: ASTM G154 defines the procedures for exposing materials to fluorescent UV radiation in controlled laboratory conditions to evaluate their resistance to degradation, fading, embrittlement, and other effects caused by UV exposure.

- Application: Primarily used for assessing the effects of UV radiation on materials such as polymers, coatings, paints, and other non-metallic substances.

- Parameters: Provides guidelines for controlling UV irradiance levels, temperature, humidity, and exposure cycles during testing.

 

- Light Source: ASTM G155 focuses on xenon arc light apparatus, replicating a broader spectrum of light including UV, visible, and IR, while ASTM G154 specifically focuses on fluorescent UV lamp apparatus, emphasizing UV radiation.

- Application Focus: ASTM G155 covers exposure to a wider range of environmental factors akin to natural sunlight, whereas ASTM G154 is specifically tailored to assess the impact of UV radiation.

- Materials Tested: Both standards are used for non-metallic materials but may be chosen based on the specific environmental conditions being simulated and the type of material being evaluated.

 

In summary, ASTM G155 and ASTM G154 are ASTM standards that provide guidance for simulating different aspects of environmental exposure in accelerated weathering testing, with G155 focusing on xenon arc light and G154 specifically addressing fluorescent UV lamp exposure. The choice between these standards often depends on the specific testing requirements and the type of material being evaluated.