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Please download Chrome or Firefox or view our browser tips. The etching time is generally 10 to 20 min. The surface is the cathode. 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.
NOTE 4—Caution should be exercised during vapor degreasing of magnesium atm. Contaminants, such as metal particles, oils, etc. Last previous edition D — 90 Satisfactory surface preparations have been accomplished by using paste-type etchants.
Thorough rinsing should follow. This abstract is a brief summary of the referenced standard. 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 On the basis of the results of 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?
Hand sanding, rubbing with metal wool, and wire brushing are the least effective methods. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phonefaxor service astm. This method should be used only in cases where other methods cannot be used.
Parts must be bonded immediately. It does not address the preparation of cast metals. 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 D2651 – 01(2016)
Wash, vaporize degrease, and brush or air blasted dry oil-free air surfaces to remove all traces of the abrasives. The methods may be revised or supplemented, as necessary, to include methods based on proven performance. Investigation should be made to determine the time limitation of the adhesive and the rate of change on the surface of the adherend.
Material Sulfuric acid 6. The values 2d651 in parentheses are for information only. This guide covers procedures for preparing various wrought metal surfaces for adhesive bonding. Rinsing should be sufficiently long and vigorous to assure removal of soluble residue chemicals, or particles. Referenced Documents purchase separately The documents listed below are referenced within the subject standard but are not provided as part of the standard.
This test depends on the observation that a clean surface one that is chemically active or polar d6251 hold a continuous? The parts are raised above the tank and allowed to dry thoroughly. Initial treatment is at about 5 to 10 V.
The useful life of solutions depends upon the number and size of the parts being prepared.
Especially detrimental are paint or other spraying operations, processes using powdered materials, oil vapors from pumps and other machinery and spraying of mold release agents. ASTM D2615 takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.
Do not allow to dry. Thin sheet steel may be warped due to peening of the blasting abrasives. Same mechanical methods as that employed in stainless steel and chemical etching by nitric-phosphoric acid solution may be used for carbon steel preparation.
Same mechanical methods as that employed in stainless steel and chemical etching by nitric-phosphoric acid solution may be used for carbon steel preparation. 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 After removing from any rinse the water-break test is commonly used.
Aluminum oxide-impregnated nylon matting, glass-bead blasting and aluminum oxide cloth are d265 acceptable abrasives. The surface is anodically etched again using a wrapped electrode and a deep-etching solution.
Originally published as D — This is known as a water-break-free condition. In production bonding of complicated or large parts, the time interval may exceed 8 h.
ASTM International – Standard References for ASTM D – 01()
Oxidation can occur in a very short time, even before the parts are dry. Terminal voltages and current decay schedules are typically speci? This standard has been approved for use by agencies of the Department of Defense. Abrasive and debris should be wiped or water rinsed from the surface. If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards, at the address shown below.
This website aztm best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3. Exercise care to ensure that all abrasive materials grit, sand, cloth, sand paper, or brushes are free from contamination that may be spread or rubbed onto the steel.
ICS Number Code Thorough rinsing follows, usually in warm to hot running water.