INVESTIGATIONS ON THE SEAWATER CORROSION BEHAVIOUR OF HOT-GALVANISED PROTECTIVE COATINGS ON STEEL. PART 2: MATHEMATICAL/STATISTICAL ASSESSMENT OF TEST RESULTS

In the experimental work on hot-galvanised coatings described in Part 1 (see preceding Abstract), much information was obtained from the tests on rotating discs. These tests indicated that the rate of seawater corrosion usually increased quickly at first and that this phase was followed by a steady phase with a constant corrosion rate. It was also found that the effect of the structure of the zinc coating on corrosion behaviour depended on potential differences that could exist between the phases and cause intercrystalline corrosion. In the present part of the article, a mathematical/statistical evaluation of the results obtained from the rotating disc tests is presented under the headings: Functions for the Weight-Loss/Time Curves and the Alteration of the Potential with Time; Regression Analyses (Weight losses and potentials--Relationships between the equations for the initial and steady phases); Discussion on the Relationships Found through Regression Analyses (Potential and corrosion--Selective corrosion and weight-loss in the initial and steady phases--Influence of surface-film formation on corrosion behaviour). It is concluded inter alia that the life of the corrosion protection afforded by a hot-galvanised coating in seawater is probably determined more by the galvansising process itself than by the operating conditions. Order from: BSRA as No. 48,412.

  • Corporate Authors:

    Institut fuer Schiffbau

    Wismarsche Strasse 617
    25 Rostock,   Germany 
  • Authors:
    • Bohm, D
  • Publication Date: 1977

Language

  • German

Media Info

  • Features: References;
  • Pagination: 7 p.
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00179224
  • Record Type: Publication
  • Source Agency: British Ship Research Association
  • Report/Paper Numbers: No.3/4
  • Files: TRIS
  • Created Date: Aug 19 1978 12:00AM