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Longer dwell times should be avoided. This test depends on the observation that a clean surface one that is chemically active or polar will hold a continuous? Generally in production, a series of tanks containing the necessary solutions is arranged with overhead cranes to transport parts to be prepared.
The adhesive or adhesive primer must be applied immediately after drying. Take the smart route to manage medical device compliance. Do not allow to dry. Astn 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 Click to learn more.
DuPont, Wilmington, DE x2651 Distilled water should be used in the test, and a drainage time of about 30 s should be allowed. Apply the adhesive immediately after the treatment. 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.
Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. After removing from any rinse the water-break test is commonly used. This abstract is a brief summary of the referenced standard.
Search all products by. This is especially true for stainless steel. Nitric acid-ferric chloride solution degreasing; sulfuric acid-dichromate-ferric sulfate solution etching; and chemical treatment by nitric-acid-sodium chlorite solutions may be used for copper and copper alloy preparation. Vapor blasting by water or steam and an abrasive is the most effective method and does not warp parts, if done carefully. 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?
D265 must be bonded immediately. Thorough rinsing should follow.
Contaminants, such as metal particles, oils, etc. Commercial vapor degreasing equipment is usually used. Any trace of residual cleaning solution should be removed or a false conclusion may be made.
Exercise care in using any mechanical method to prevent deep gouges or rough surfaces which are not conducive to good bonding.
ASTM D2651 – 01(2016)
It produces s2651 smut-free surface that can be treated by other chemical processes. These paste systems can be made by adding fumed silica to the sulfuric-dichromic acid solutions. Historical Version s – view previous versions of standard. The application of these paste systems allows for their use in fairly controlled areas.
ASTM International – Standard References for ASTM D – 01()
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 astk use of conversion coatings and wash primers.
This standard has been approved for use by agencies of the Department of Defense. This guide covers procedures for preparing various wrought metal surfaces for adhesive bonding. Magnesium Alloys C2651 and Copper Alloys. The methods may be revised or supplemented, as necessary, to include methods based on proven performance.
You may find similar items within these categories by selecting from the choices below:. Accept and continue Learn more about the cookies we use and how to change your settings. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard. Dd2651 T, D2615, CA The methods may be revised or supplemented, as necessary, to include methods based on proven performance.
The wide variety of individual alloys and heat treatments under each group, the fact that certain adhesives exhibit speci? A break in the water? NOTE 9—If treating solution is to be used for d651 continuous operation or reused, it should be discarded after 4 to 6 h at the temperatures in Contaminating operations in the area should be avoided. Worldwide Standards We can source any standard from anywhere in the world.
Same mechanical methods as that employed in stainless steel and chemical etching by nitric-phosphoric acid solution may be used for carbon steel preparation. Solutions should be sampled periodically and analyzed for materials pertinent to the particular treatment method, such as, titration for hexavalent chromium CrO3iron, chlorides, aluminum, etc.
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.
Last previous edition D — 90 Standards should be established and records kept for such tests aztm each lot or vat of solution. Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. The useful life of solutions depends upon the number and size of the parts being prepared. The surface is anodically etched again using a wrapped asfm and a deep-etching solution.