publication . Thesis

Evaluation of tests for porosity and defects in PVD and electroless coatings.

Ernst, Petra.;
Open Access English
  • Publisher: Sheffield Hallam University,
  • Country: United Kingdom
Abstract
The porosity of electroless nickel, (TiAl)N, TiN and CrN PVD coatings on mild steel having different surface roughnesses was investigated using porosity/corrosion tests. The tests used were the neutral salt spray test, ferroxyl test, sulphur dioxide test and the copper cementation test. Additionally the effect of radii on the corrosion resistance and porosity of electroless nickel coatings was examined. Electron optics, GDOES and ICP were used to evaluate the limits of their applicability to extend porosity/corrosion tests used on coated specimen. A marking technique was developed which enabled individual features on coated surfaces to be examined by SEM before ...
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