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Do not allow the time interval between treatment and bonding to exceed 72 h, and cover or wrap all parts during the interval with a non-contaminating vapor barrier material.

ASTM D2651 – 01(2016)

A number in parentheses indicates the year of last reapproval. After removing from any rinse the water-break test is commonly used. Rinsing may be done by spray or by dipping in a tank in which the water is circulated and constantly being renewed by an over?

It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. This is known as a water-break-free condition.

Parts are suspended in the vapor zone above the hot liquid and allowed to remain until there is condensation and run off approximately 5 min. Exercise care in using any mechanical method to prevent deep gouges or rough surfaces which are not conducive to good bonding.

It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations d26511 to use. Your comments are invited either for revision of this standard asgm for additional standards and should be addressed to ASTM International Headquarters. It produces a smut-free surface that can be treated by other chemical processes.

NOTE 9—If treating solution is to be used for a continuous operation or reused, it should be discarded after 4 to 6 h at the temperatures in Investigation should be made to determine the time limitation of the adhesive and the rate of change on the surface of the adherend.


Parts must be bonded immediately.

Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. The major problem is to apply sufficient thickness of coating to prevent corrosion, but not so thick that the bond fails within the coating. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard. Thorough rinsing should follow. Material Sulfuric acid 6. This step is repeated if necessary until all visible contamination is removed.

Finishing voltages from 15 to 25 V are used. The wide variety of individual alloys and heat treatments under each group, the fact that certain adhesives exhibit speci?

Same mechanical methods as that employed in stainless steel and chemical etching by nitric-phosphoric acid solution may be used for carbon steel preparation.

The methods may be revised or supplemented, as necessary, to include methods based on proven performance. Peening action of any blast process may work-harden the surface of some base metals. Sand blast, grit blast, or vapor hone may be used. This is especially true for stainless steel. It does not address the preparation of cast metals. The surface is anodically etched again using a wrapped electrode and a deep-etching solution.

Surface preparation for magnesium alloys which is closely associated with corrosion prevention shall involve vapor, alkaline-detergent solution, chromic acid, and sodium hydroxide acid degreasing; anodic treatment; and the use of conversion coatings and wash primers.

Longer dwell times should be avoided. The useful life of solutions depends upon the number and size of the parts being prepared. Initial treatment is at about 5 to 10 V. Your comments will d26551 careful consideration at a meeting of the responsible technical committee, which you may attend. Some of these coatings exhibit good surfaces for adhesive bonding.


Somewhat lower bond strength results from this method compared to other methods described. The use of a Series stainless steel for such equipment is suggested.

ASTM D – 01() – Standard Guide for Preparation of Metal Surfaces for Adhesive Bonding

ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Current edition approved Oct. This guide covers procedures for preparing various wrought metal surfaces for adhesive bonding.

Aluminum oxide-impregnated nylon matting, d26511 blasting and aluminum oxide cloth are typical acceptable abrasives. Preliminary tests should be conducted with the speci? It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applica- 1 This guide is under the jurisdiction of ASTM Committee D14 on Adhesives and is the direct responsibility of Subcommittee D The high reactivity of magnesium requires that corrosion-preventative coatings be applied for most service applications.

The surface should be recleaned until the test is passed. A pH reading or acid content of trichloroethane vapor degreasing solution, or both, should be obtained. NOTE 1—No entirely foolproof method exists to determine bondability of a metal surface after preparation. On the basis of the results v2651 such an investigation, it may be possible to extend the length of time and establish standards for the interval between surface preparation and adhesive application to?