How Low is "Low Oxygen Content" in the Coating?

Here is an example of chemical analysis data for oxygen content in the Ni-45Cr-1Ti coatings, applied by different thermal spay processes. In each coating, oxygen is present in a form of an oxide scale and as dissolved oxygen in the metal matrix. Due to high chromium content, the chosen material is sensitive to oxidation in a spray jet, thus, ideal for comparison purposes. All data are in wt.%.

Electric Arc » stock: 0.02% coating: 7.0%		Plasma » stock: 0.05% coating: 3.8%
HVOF » stock: 0.06% coating: 1.9%		AcuKote HVAF » stock: 0.06% coating: 0.28%