Chemical exposure indication device
AssigneeThe Boeing Company
InventorsCarl W. Beck, Rebecca L. Storey
Life of this patent
Estimating the term…
Abstract
A chemical exposure indication device is disclosed. The device is removably attachable to a structure and includes a substrate having a first surface and a second surface and an indicating layer overlying the first substrate surface. The indicating layer includes a coating material that is chemically reactive with a pre-determined chemical compound that is known to degrade the structure. When the coating material is exposed to that corrosive compound in a pre-determined level associated with degradation of a metallic structure, the coating material provides a visual indication of the presence of the corrosive compound.
Claims19
A chemical exposure indication device comprising:
- a substrate having a first surface and a second surface;
- an indicating layer overlying the first substrate surface;
- and
- means for removably attaching the device to a metallic structure,
- wherein the indicating layer comprises a coating material that is chemically reactive with a pre-determined chemical compound known to degrade the structure, such that when the coating material is exposed to a pre-determined level of the chemical compound, the coating material provides a visual indication of the compound's presence;
- wherein the pre-determined level of exposure corresponds to a level of exposure to the compound that is associated with degradation of the metallic structure;
- and wherein the coating material is chemically reactive with a chemical compound selected from the group consisting of ammonia, chlorine, hydrogen peroxide, iodine, alkaline hydroxides, and alcohols.
A chemical exposure indication device comprising:
- a substrate having a first surface and a second surface, the first surface underlying an indicating layer of a coating material that is chemically reactive with a pre-determined corrosive chemical compound, such that when exposed to a gaseous form of the chemical compound, the coating material changes color to provide a visual indication of the presence of the corrosive compound;
- and
- means for attaching the substrate to the metallic structure;
- and wherein the coating material is chemically reactive with a chemical compound selected from the group consisting of ammonia, chlorine, hydrogen peroxide, iodine, alkaline hydroxides, and alcohols,
- wherein the degree of color change is associated with the amount of corrosive compound to which the coating has been exposed and wherein the device has an effective service period of at least one month in the absence of exposure to the pre-determined corrosive compound.
A chemical exposure indication device comprising:
- a foil tape over-coated on one side with a layer of chemically reactive paint, which is reactive with a chemical compound selected from the group consisting of ammonia, chlorine, hydrogen peroxide, iodine, alkaline hydroxides, and alcohols, and having an adhesive on the other side, wherein the paint changes color when the device is exposed to a pre-determined corrosive gas in a pre-determined amount that would cause degradation of a metallic structure to which the device is applied, and wherein the device has an effective service period of at least one month in the absence of exposure to the pre-determined corrosive gas.
Dependencies are inferred from the claim text.