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Significance and Use
4.1 The atmospheric exposure tests described in this practice will evaluate the stability of the adhesive bond only in terms of a particular natural atmosphere. Since the atmospheric conditions vary greatly from year to year, these results will not be as reproducible as those derived from laboratory aging procedures. Considerable research has shown that laboratory artificial weathering tests will not give consistently good correlation with outdoor test exposures (2, 3, 4).
1.2 The procedure for sheltered atmospheric exposure, such as a Stevenson screen (1),2 of adhesive-bonded joints and specimens is the same except for the requirements of facing south and measurement of solar radiation.
1.3 This practice is limited to the procedure by which samples are exposed and does not cover the tests that may be used to evaluate the effects of atmospheric exposure on these adhesive-bonded joints and structures. These samples could be any one of several varieties.
1.4 Suitable test methods for evaluation of the effects of exposure include nondestructive qualitative or quantitative observations on the same sample at prescribed intervals, or destructive tests on separate sets of specimens in accordance with such tests as Test Method D1002.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D896 Practice for Resistance of Adhesive Bonds to Chemical Reagents
D897 Test Method for Tensile Properties of Adhesive Bonds
D907 Terminology of Adhesives
D1002 Test Method for Apparent Shear Strength of Single-Lap-Joint Adhesively Bonded Metal Specimens by Tension Loading (Metal-to-Metal)
ICS Number Code 83.180 (Adhesives)
UNSPSC Code 31201601(Chemical adhesives)