| 主权项 |
1. A coating for inhibiting corrosion on a metal substrate, the coating comprising a corrosion inhibiting composition comprising:
a first plurality of carriers, each comprising a first carrier body and a first corrosion inhibitor, the first carrier body encapsulating the first corrosion inhibitor, wherein the first corrosion inhibitor is a first organic compound comprising a ring structure and wherein the first carrier body is formed of a first degradable material; and a second plurality of carriers, each comprising a second carrier body and a second corrosion inhibitor, the second carrier body encapsulating the second corrosion inhibitor, wherein the second carrier body is formed of a second degradable material; wherein the second corrosion inhibitor is a second organic compound comprising a ring structure, wherein the second corrosion inhibitor is different from the first corrosion inhibitor, wherein the second plurality of carriers does not include the first corrosion inhibitor and the first plurality of carriers does not include the second corrosion inhibitor, and wherein the first degradable material has a mechanical integrity which deteriorates in at least one of an alkaline condition and an acidic condition sufficient to release the first corrosion inhibitor from the first degradable material; wherein the coating exhibits a creep value of about 0.6 mm or less according to a hot salt water test when the coating is tested at a thickness of 25 microns, wherein the hot salt water test comprises: cutting an X-shaped cut into a test piece of a metal substrate comprising a base material using an SK2 cutting knife having a hardness of HV 820+/−30, wherein the X-shaped cut has a cross angle from 60° to 90° and reaches the base material of the metal substrate, immersing the test piece in a 5 wt % NaCl solution at 55° C. in a container, sealing the container, removing the test piece from the container after 240 hours and rinsing and wiping the test piece, measuring a width of any rust and/or blister on the test piece in order to determine a blister width, and attaching a 12 or 24 mm wide piece of cellophane adhesive tape to the rust and/or blister, holding the edge of the adhesive tape to form an angle of 45° between the adhesive tape and test piece, peeling off the adhesive tape, and measuring a width of any resulting peeled portion in order to determine a peeling width, wherein the creep value is the larger of the peeling width and the blister width. |
