Method of measuring anodize coating amount using infrared absorbance
AssigneeThe Boeing Company
InventorsPaul H. Shelley, Linda A. Caldwell Stancin, Kathryn A. Soucy
Life of this patent
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Abstract
A non-destructive method is provided for determining the amount of an anodize coating on a metallic substrate. A value of infrared energy reflected from the metallic substrate without the anodize coating is determined. A value of infrared energy reflected from the metallic substrate with the anodize coating is determined. A value of infrared energy absorbed in the anodize coating is determined, and the value of the infrared energy absorbed in the anodize coating is correlated to an amount of the anodize coating.
Claims24
A non-destructive method of determining an amount of anodize coating on a metallic substrate, the method comprising:
- non-destructively determining a value Ia of infrared energy at a predetermined wavelength within a range of about 10.6 microns to about 11.2 microns absorbed in an anodize coating on a metallic substrate;
- and
- correlating the value Ia of the infrared energy absorbed in the anodize coating to an amount of the anodize coating.
A non-destructive method of determining an amount of an anodize coating on a metallic substrate, the method comprising:
- transmitting an infrared beam having a predetermined wavelength within a range of about 10.6 microns to about 11.2 microns through an anodize coating on a metallic substrate at a predetermined incident beam angle relative to normal, the transmitted beam having a cross-sectional area to produce a predetermined spot size on a surface of the anodize coating;
- reflecting the infrared beam off the metallic substrate to form a reflected beam;
- detecting the reflected beam;
- comparing infrared energy Ic of the reflected beam with a predetermined value of infrared energy Io reflected off the metallic substrate without the anodize coating to determine absorbance value Ia for the anodize coating;
- and
- correlating the absorbance value Ia for the anodize coating to an anodize coating amount.
A non-destructive method of determining an amount of anodize coating on a metallic substrate, the method comprising:
- transmitting an infrared beam having a predetermined wavelength within a range of about 10.6 microns to about 11.2 microns through an anodize coating on a metallic substrate at a predetermined incident beam angle in a range from about 30 degrees to about 60 degrees from normal, the transmitted beam having a cross-sectional area to produce a predetermined spot size in a range from about 2 mm to about 35 mm on a surface of the anodize coating;
- reflecting the infrared beam off the metallic substrate to form a reflected beam;
- detecting the reflected beam;
- comparing infrared energy Ic of the reflected beam with a predetermined value of infrared energy Io reflected off the metallic substrate without the anodize coating to determine an absorbance value Ia for the anodize coating;
- and
- correlating the absorbance value Ia for the anodize coating to an anodize coating amount.
Dependencies are inferred from the claim text.