Astm a780 pdf

United States. No further reproductions authorized. Color red Pos 10 The liquidus temperature is that temperature above which an alloy is completely molten.

The zinc-tin-copper alloys have a liquidus temperature in the range from to F to C , but they are applied while in a semisolid state in the preferred application temperature range from to F to C. The solders can be used in rod form or as powders. Annex A1 describes the use of zinc-based solders. The repair paint to be used shall be selected by the galvanizer, unless the purchaser specifies a particular concentration or paint system.

Annex A2 describes the use of paints containing zinc dust. Specification D describes the zinc dust component of these paints. Annex A3 describes the use of sprayed zinc. Keywords 5.

To ensure that a smooth reconditioned coating can be effected, surface preparation shall extend into the surrounding, undamaged galvanized coating. Do not overheat the surface beyond F C , nor allow the surrounding galvanized coating to be burned.

Wire brush the surface to be reconditioned during preheating. Pre-flux, if necessary. When powdered zinc alloys are used, sprinkle the powder on the cleaned, preheated surface and spread out with a spatula or similar tool. The thickness of the applied coating shall be as agreed upon between the contracting parties.

Experience shows that in general, organic zinc-rich systems are tolerant of marginal surface preparation. Most organic paints containing zinc dust are not critical of climatic or atmospheric conditions for curing. The following general guidelines shall apply:. For less critical field. Where circumstances do not allow blast or power tool cleaning, it is permissible to hand tool areas clean in accordance with SSPC-SP2.

To ensure that a smooth reconditioned coating can be effected, surface preparation shall extend into the undamaged galvanized coating. The method and extent of surface preparation shall be mutually agreeable to the contracting parties. Apply the paint as in accordance with the manufacturers printed instructions in a single application employing multiple passes to achieve a dry film thickness to be agreed upon between the contracting parties.

Allow adequate curing time before subjecting repaired items to service conditions in accordance with the manufacturers printed instructions. Apply the sprayed coating as soon as possible after surface preparation and before visible deterioration of the surface has occurred. LeJeune Rd.

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Open navigation menu. Close suggestions Search Search. Printing Office, Washington, DC, LeJeune Rd. Committee A05 has identified the location of selected changes to this standard since the last issue A 01 that may impact the use of this standard.

May 1, 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 five years and if not revised, either reapproved or withdrawn.

Your comments are invited either for revision of this standard or for additional standards and should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of the responsible technical committee, which you may attend. 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.

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Search inside document. May 1, 1 Revised 1. Gustavo Suarez. Mauricio Adame. Sharmaine Gomez Falcis. The method and extent of surface preparation shall be mutually agreeable to the contracting parties. Government Printing Office. PA LeJeune Rd. June FL Galvanizing Repair. High Zinc Dust Content. Type II Organic. Apply the sprayed coating as soon as possible after surface preparation and before visible deterioration of the surface has occurred. Where circumstances do not allow blast or power tool cleaning.

This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years and if not revised. West Conshohocken. United States. Users of this standard are expressly advised that determination of the validity of any such patent rights. Individual reprints single or multiple copies of this standard may be obtained by contacting ASTM at the above address or at phone. Your comments will receive careful consideration at a meeting of the responsible technical committee.

May 1. Permission rights to photocopy the standard may also be secured from the ASTM website www. ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentioned in this standard.

If you feel that your comments have not received a fair hearing you should make your views known to the ASTM Committee on Standards. PO Box C