ASTM D2651 PDF

Buy ASTM D R GUIDE FOR PREPARATION OF METAL SURFACES FOR ADHESIVE BONDING from SAI Global. Purchase your copy of ASTM D – 01() as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. Find the most up-to-date version of ASTM D at Engineering

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We use cookies to make our website easier to use and to better asmt your needs. It is not suitable for adhesives containing chlorides or for hot-bonding polyethylene. ICS Number Code Same mechanical methods as that employed in stainless steel and chemical etching by nitric-phosphoric acid solution may be used for carbon steel preparation. DuPont, Wilmington, DE Several commercial products are available. Records should indicate the continuous conditions astn solutions, such as d261 of constituents added to bring solutions within limits, amount of contaminants present and date prepared see Methods D Search all products by.

Satisfactory surface preparations have been accomplished by using paste-type etchants. Contaminants, such as metal particles, oils, etc. Surface treatment methods involving both mechanical and chemical techniques are included for aluminum alloys, stainless steel, carbon steel, titanium alloys, magnesium alloys, and copper and copper alloys.

Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every? Exercise extreme care to ensure removal of all traces of the etchant. Commercially available proprietary solutions may d22651 used. The major problem is in preventing oxidation of the surfaces.

Finishing voltages from 15 to 25 V are used. The major problem is to apply sufficient thickness of coating aastm prevent corrosion, but not so thick that the bond fails within the coating. This standard has been approved for use by agencies of the Department of Defense.

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ASTM D2651 – 01(2016)

You may find similar items within these categories by selecting from the choices below:. NOTE 4—Caution should be exercised during vapor degreasing of magnesium alloys. 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?

ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

Other metals may be used if they are resistant to the solution used. Previously bonded parts, such as honeycomb core materials, are usually not degreased due to difficulty in removing residue.

D 胶粘剂粘结用金属表面处理_百度文库

Usually, the time should not exceed 8 h and parts should be covered or wrapped in Kraft paper. Individual reprints single or multiple d251 of this standard may be obtained by contacting ASTM at the above asstm or at phonefaxor service astm.

Procedure NOTE 3—The surface preparation methods for magnesium alloys are closely associated with corrosion prevention. The number of times a process may be repeated depends upon the amount of metal removed in relation to the tolerance requirements for the part and whether clad or bare metal is used.

Initial treatment is at about 5 to 10 V. Accept and continue Learn more about the cookies we use and how to change your settings. If continuous failures occur, the treating process itself should be analyzed to determine the cause of the problem. If a water-break-free condition is not observed on the treated surface, it should not be used for bonding. Terminal voltages and current decay schedules are typically speci? Some of these coatings exhibit good surfaces for adhesive bonding. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.

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The surface is anodically etched again using a wrapped electrode and a deep-etching solution. The etching time is generally 10 to 20 min. This is especially true for stainless steel. The methods may be revised or supplemented, as necessary, to include methods based on proven performance. 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.

Bond strengths obtained using either of these surface preparations are somewhat lower asrm those from the immersion processes. NOTE 1—No entirely foolproof method exists to determine bondability of a metal surface after preparation.

These paste systems can be made by adding fumed silica to the sulfuric-dichromic acid solutions.

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. A superscript epsilon e indicates an editorial change since the last revision or reapproval. Same mechanical methods as that employed in stainless steel and wstm etching by nitric-phosphoric acid solution may be used for carbon r2651 preparation.

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