ASTM D Standard Recommended Practice for Preparation of Metal. Surfaces for Adhesive Bonding. ASTM D Standard Guide for. D – Designation: D – 98 AMERICAN SOCIETY FOR TESTING PA Reprinted from the Annual Book of ASTM Standards. D, Method r, and ASTM E involves the etching of aluminum dure is described in ASTM D and involves the application of.

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A number in parentheses indicates the year of last reapproval. A superscript epsilon e indicates an editorial change since the last revision or reapproval.

The method may be revised or supplemented, as necessary, to include methods based on proven performance.

The values given in parentheses are for information only. 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.

Current edition approved May 10, Originally published as D— Last previous edition D— The preparation of the metallic substrates to obtain surfaces with appropriate characteristics is a critical step.

Phosphoric acid anodizing per BAC5555 and ASTM D3933-98

Improper surface preparation can produce seemingly acceptable bonds that can degrade rapidly with time. This guide describes one method on how to properly prepare sstm surfaces can be obtained. Experience has shown that when adhesively bonded aluminum surfaces which have been prepared in accordance with this guide produce relatively reproducible, durable bonds. Periodically check, clean, or replace?

Tanks should be equipped with a surface skimming device to remove surface contamination, a? NOTE 1—Most regionally distributed potable water will meet these requirements.


If the potential cannot be reestablished within 2 min, then rinse and reprocess starting d393 the deoxidizer.

Standard Guides for Automotive and Aerospace Adhesives from ASTM

Parts should be held in astmm limited contamination area prior to priming and should not be handled 5. However, it is most desirable to prime parts as soon as possible to minimize the possibility of inadvertent contamination.

Single spray or double counter-current immersion rinsing are commonly used. When double independent feed or double-counter current immersion rinse is used, the? Immersion rinse tank s used for anodize rinse shall be used for anodize rinse only.

Solutions used in this process are corrosive and toxic.

Avoid breathing solution mists or vapors. Do not allow solutions to get on the eyes, on the skin, or on clothing. V3933 2—A single-rack facility is one with a single anode rack between each set of cathodes. A multi-rack has two or three anode racks between each set of cathodes.

Quality Assurance Provisions 8. There shall be no stains, streaks, discoloration, or residue on surfaces of anodized parts after rinsing 5. Small irregularities at points of electrical contact are acceptable. If practical, put electrical contacts in areas that will not be bended or in a trim tab that will be removed from the?

Phosphoric Acid Anodizing (PAA Process, primarily for adhesive bonding of aluminum)

d393 The colors most frequently seen are purple, yellow, blue, and green hues. Abrupt differences in color of local areas, except at electrical contact points, from the background color are not acceptable. Causes of such differences may be? NOTE 3—The color change may be difficult or impossible to detect on surfaces that have been etched by marking ink, roughened by machining, sanding, deburring, etc.


In these cases, the presence of color on tool tabs or on the opposite surface, or on undisturbed surfaces, may be evidence that the surface is acceptably anodized. These control specimens should exceed the minimum strength and durability requirements.

Use the following formula: The level of solution in the tank should be within the effective dd3933 level for the surface skimming equipment. Precision and Bias 9.

Standard Guides for Automotive and Aerospace Adhesives from ASTM

Precision shall be reported in terms of the standard deviation of the data and the standard error of the mean. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the risk of infringement of such rights, are entirely their own responsibility.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.