The work involved in the project was carried out at Farg AB International and ESAB between July 1973 and November 1974. The object was to find a suitable method of determining the air impurities formed when welding shop-primer-coated steels. The tests were carried out with five different manual welding electrodes with deposition rates ranging from 125% to 240%, using different combinations of electrodes and primers. Unalloyed steel plates type SIS 14 13 12, 250 x 50 x 12 mm were used, sandblasted to a degree of accuracy of Sa 2 1/2. Shop primer was applied to both sides of the plates, with a dry-film thickness of 25-30 millimicron for four of the primers used. For iron-oxide pigmented shop primers based on epoxy resin a dry-film thickness of 30-35 millimicron was applied. A high-pressure spray gun was used for applying the primer and drying time, prior to welding, lasted for over a month. The welding and sampling equipment is described and the results presented in a series of tables. It was shown that the presence of a coating of dry-film thickness of approximately 30 mm considerably increases the amount of solid particles when welding in ship primers with a high zinc content. When using other types of primers, this increase is insignificant, and the fume-extraction equipment used should be sufficiently effective. The zinc tetraoxy-chromate present in most shop primers as a rust inhibitor need not be taken into consideration.

  • Corporate Authors:

    Elektriska Svetsning Aktiebolaget

    P.O. Box 8850
    S-402 71 Goteborg 8,   Sweden 
  • Publication Date: 1976

Media Info

  • Features: References;
  • Pagination: 8 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00153036
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Files: TRIS
  • Created Date: May 11 2003 12:00AM