ASTM D6695-16

Standard Practice for Xenon-Arc Exposures of Paint and Related Coatings

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STANDARD published on 1.5.2016

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The information about the standard:

Designation standards: ASTM D6695-16
Publication date standards: 1.5.2016
SKU: NS-639893
The number of pages: 6
Approximate weight : 18 g (0.04 lbs)
Country: American technical standard
Category: Technical standards ASTM

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Environmental testing Paints and varnishes

Annotation of standard text ASTM D6695-16 :

Keywords:
degradation, exposure, light exposure, ultraviolet, weathering, xenon-arc,, ICS Number Code 19.040 (Environmental testing), 87.040 (Paints and varnishes)

Additional information

Significance and Use

4.1 The ability of a paint or coating to resist deterioration of its physical and optical properties caused by exposure to light, heat, and water can be very significant for many applications. This practice is intended to induce property changes associated with end use conditions, including the effects of daylight, moisture, and heat. The exposure used in this practice is not intended to simulate the deterioration caused by localized weather phenomena such as atmospheric pollution, biological attack, and salt water exposure.

4.2 Caution—Variation in results may be expected when different operating conditions are used. Therefore, no reference to the use of this practice shall be made unless accompanied by a report prepared according to Section 9 that describes the specific operating conditions used. Refer to Practice G151 for detailed information on the caveats applicable to use of results obtained according to this practice.

Note 2: Additional information on sources of variability and on strategies for addressing variability in the design, execution and data analysis of laboratory accelerated exposure tests is found in Guide G141.

4.2.1 The spectral power distribution of light from a xenon-arc is significantly different from that produced in light and water exposure devices using carbon-arc or other light sources. The type and rate of degradation and the performance rankings produced by exposures to xenon-arcs can be much different from those produced by exposures to other types of laboratory light sources.

4.2.2 Interlaboratory comparisons are valid only when all laboratories use the same light source, filter type, and exposure conditions.

4.3 Reproducibility of test results between laboratories has been shown to be good when the stability of materials is evaluated in terms of performance ranking compared to other materials or to a control.6^,7 Therefore, exposure of a similar material of known performance (a control) at the same time as the test materials is strongly recommended. It is recommended that at least three replicates of each material be exposed to allow for statistical evaluation of results.

4.4 Test results will depend upon the care that is taken to operate the equipment according to Practice G155. Significant factors include regulation of line voltage, freedom from salts or other deposits from water, temperature and humidity control, and condition and age of the lamp and filters.

4.5 All references to exposures in accordance with this practice must include a complete description of the test cycle used.

1. Scope

1.1 This practice covers the selection of test conditions for accelerated exposure testing of coatings and related products in xenon arc devices conducted according to Practices G151 and G155. This practice also covers the preparation of test specimens, the test conditions suited for coatings, and the evaluation of test results.

Note 1: This practice and ISO 16474-2 address the same subject matter but differ in technical content.

1.2 The values SI units are to be regarded as standard. The values given in parentheses are for information only.

1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

2. Referenced Documents

D1186-01	Standard Test Methods for Nondestructive Measurement of Dry Film Thickness of Nonmagnetic Coatings Applied to a Ferrous Base (Withdrawn 2006)
D1400-00	Standard Test Method for Nondestructive Measurement of Dry Film Thickness of Nonconductive Coatings Applied to a Nonferrous Metal Base (Withdrawn 2006)
D714-02(2017)	Standard Test Method for Evaluating Degree of Blistering of Paints
D772-18	Standard Test Method for Evaluating Degree of Flaking (Scaling) of Exterior Paints
D823-18(2022)	Standard Practices for Producing Films of Uniform Thickness of Paint, Coatings and Related Products on Test Panels
D1005-95(2020)	Standard Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers
D610-08(2019)	Standard Practice for Evaluating Degree of Rusting on Painted Steel Surfaces
D659-86	Method of Evaluating Degree of Chalking of Exterior Paints (Withdrawn 1989)
D660-93(2019)	Standard Test Method for Evaluating Degree of Checking of Exterior Paints
D662-93(2019)	Standard Test Method for Evaluating Degree of Erosion of Exterior Paints
D358-98	Standard Specification for Wood to Be Used as Panels in Weathering Tests of Coatings
D523-14(2018)	Standard Test Method for Specular Gloss
D609-17(2022)	Standard Practice for Preparation of Cold-Rolled Steel Panels for Testing Paint, Varnish, Conversion Coatings, and Related Coating Products
D3359-23	Standard Test Methods for Rating Adhesion by Tape Test
D3980-88	Practice for Interlaboratoy Testing of Paint and Related Materials (Withdrawn 1998)
D4214-23	Standard Test Methods for Evaluating the Degree of Chalking of Exterior Paint Films
D5870-22	Standard Practice for Calculating Property Retention Index of Plastics
E691-23	Standard Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
E1347-06(2020)	Standard Test Method for Color and Color-Difference Measurement by Tristimulus Colorimetry
G113-22	Standard Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
G141-09(2021)	Standard Guide for Addressing Variability in Exposure Testing of Nonmetallic Materials
G147-17	Standard Practice for Conditioning and Handling of Nonmetallic Materials for Natural and Artificial Weathering Tests
D2244-23	Standard Practice for Calculation of Color Tolerances and Color Differences from Instrumentally Measured Color Coordinates
D2616-19	Standard Test Method for Evaluation of Visual Color Difference With a Gray Scale
G151-19	Standard Practice for Exposing Nonmetallic Materials in Accelerated Test Devices that Use Laboratory Light Sources
G155-21	Standard Practice for Operating Xenon Arc Lamp Apparatus for Exposure of Materials
G169-01(2021)	Standard Guide for Application of Basic Statistical Methods to Weathering Tests
ISO16474-2	Paints and VarnishesMethods of exposure to laboratory light sourcesPart 2: Xenon-arc lamps Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
SAEJ2412	Accelerated Exposure of Automotive Interior Trim Components using a Controlled Irradiance Xenon-Arc Apparatus Available from Society of Automotive Engineers (SAE), 400 Commonwealth Dr., Warrendale, PA 15096-0001, http://www.sae.org.
	Performance Based Standard for Accelerated Exposure of Automotive Exterior Materials using a Controlled Irradiance Xenon-Arc Apparatus
D1729-22	Standard Practice for Visual Appraisal of Colors and Color Differences of Diffusely-Illuminated Opaque Materials
D1730-09(2020)	Standard Practices for Preparation of Aluminum and Aluminum-Alloy Surfaces for Painting