DETERMINATION OF DECOMPOSITION PRODUCTS FORMED DURING WELDING ON PAINTED STEEL

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:
  • Svetsaren-English Edition
  • Issue Number: 2
  • Publisher: Elektriska Svetsning Aktiebolaget

Subject/Index Terms

• TRT Terms: Air pollution; Fumes; Pollution control; Primers; Safety; Shipyards; Welding
• Old TRIS Terms: Shipyard pollution prevention; Welder safety; Welding fumes
• Subject Areas: Environment; Marine Transportation; Safety and Human Factors;

Filing Info

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