Corrosion inhibiting additive
A corrosion resistant article including an aluminum substrate and a corrosion-inhibiting cerium based corrosion inhibitor corrosion inhibiting additive on the aluminum substrate, the corrosion inhibiting additive comprising an anodic corrosion inhibitor and a cathodic corrosion inhibitor, the anodic corrosion inhibitor greater than 25 wt % of the total inhibitor.
1. An article comprising:
a metal substrate; and
a cerium based corrosion inhibiting additive on the metal substrate, the corrosion inhibiting additive comprising an anodic corrosion inhibitor and a cathodic corrosion inhibitor, the anodic corrosion inhibitor greater than about 25 wt % of the total inhibitor.
2. The corrosion resistant article as recited in claim 1 , wherein the anodic corrosion inhibitor is at least 25 wt % ZnMoO 4 .
3. The corrosion resistant article as recited in claim 1 , wherein the anodic corrosion inhibitor is at least 50 wt % ZnMoO 4 .
4. The corrosion resistant article as recited in claim 1 , wherein the anodic corrosion inhibitor is at least 75 wt % ZnMoO 4 .
5. The corrosion resistant article as recited in claim 1 , wherein the anodic corrosion inhibitor is at least 99 wt % ZnMoO 4 .
6. The corrosion resistant article as recited in claim 1 , wherein the cathodic corrosion inhibitor includes a Ce-Citrate.
7. A method of selecting a corrosion-inhibiting substance, comprising:
selecting a cerium-based corrosion-inhibiting composition based upon a solubility range, the corrosion inhibiting additive comprising an anodic corrosion inhibitor and a cathodic corrosion inhibitor, the anodic corrosion inhibitor greater than about 25 wt % of the total inhibitor.
8. The method as recited in claim 7 , wherein the solubility range is 0.01 mM to 20 mM.
9. The method as recited in claim 7 , wherein the corrosion-inhibiting Cerium based corrosion inhibitor substance includes an anodic corrosion inhibitor containing at least 25 wt % ZnMoO 4 .
10. The method as recited in claim 9 , wherein the corrosion-inhibiting Cerium based corrosion inhibitor substance includes a cathodic corrosion inhibitor with a Ce-Citrate.
11. The method as recited in claim 9 , wherein the corrosion-inhibiting Cerium based corrosion inhibitor substance includes a cathodic corrosion inhibitor with a Ce-Tartrate, or a Ce-Acetate.
12. The method as recited in claim 7 , wherein the corrosion-inhibiting Cerium based corrosion inhibitor substance includes active sodium ions concentration lower than 1% in the corrosion inhibitor dry powder.
13. The method as recited in claim 7 , wherein the corrosion-inhibiting Cerium based corrosion inhibitor substance includes anodic and cathodic corrosion inhibitors synthesized separately as powders of a similar particle size range so that the powders can be mixed homogeneously.
14. A corrosion-inhibiting composition comprising:
a carrier fluid;
a cathodic corrosion inhibitor in the carrier fluid; and
an anodic corrosion inhibitor in the carrier fluid, the anodic corrosion inhibitor greater than about 25 wt % of the total inhibitor.
15. The composition as recited in claim 14 , wherein the carrier fluid comprises at least one of water, alcohol, organic or inorganic solvent or dispersing fluid, primer, paint, adhesive, a coolant, or sealant.