Corrosion-resistant ferrous alloys for use as impressed current anodes
OwnerJames B. Bushmaninventor
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Abstract
Impressed current anodes such as cathodic protection anodes comprise iron based alloys including less than 70% iron and less than 0.1% carbon. Additional components may include molybdenum, chromium, nickel and others. The iron based alloy may itself comprises the anode or it may provide a substrate to which an electrolytic coating is applied.
Claims31
An impressed current anode consisting essentially of a high alloy stainless steel material and a performance enhancing coating, the high alloy stainless steel material including about 45-70% iron.
An impressed current anode, consisting essentially of a high alloy stainless steel, wherein the high alloy stainless steel includes about 45-70% iron, less than 0.1% carbon, at least 10% nickel and at least 20% chromium.
An impressed current anode, consisting essentially of a high alloy stainless steel, wherein the high alloy stainless steel includes about 45-70% iron, less than 0.1% carbon, at least 20% chromium and at least 5% molybdenum.
An impressed current anode, consisting essentially of a high alloy stainless steel, wherein the high alloy stainless steel includes about 45-70% iron, less than 0.1% carbon, at least 20% nickel and at least 5% molybdenum.
An impressed current anode consisting essentially of a high alloy stainless steel, the stainless steel having about 45-70% iron and less than 0.1% carbon, at least 20% chromium, at least 20% nickel and at least 5% molybdenum.
An impressed current anode for cathodic protection consisting essentially of a high alloy stainless steel material wherein the stainless steel includes 45-70% iron.
An impressed current cathodic protection electrode for use in underwater and/or underground applications to protect against oxidation, the electrode comprised substantially entirely of a high alloy stainless steel including 45-70% iron, trace amounts of carbon, and at least about 5% molybdenum and the electrode being substantially carbon free, except for the trace carbon present in the stainless steel, and resistant to corrosion and pitting.
An impressed current cathodic protection electrode comprised substantially of a high alloy stainless steel including 45-70% iron, less than 0.1% carbon, and at least about 5% molybdenum, the stainless steel providing a substrate for a performance enhancing coating wherein the combination of the substrate and the performance enhancing coating forms substantially the entirety of the impressed current cathodic protection electrode material.
An impressed current cathodic protection electrode for use in underwater and/or underground applications to protect against oxidation, the electrode comprised substantially entirely of a high alloy stainless steel including chromium, nickel, molybdenum, nitrogen, and iron, the electrode being substantially devoid of free carbon and further being resistant to corrosion and pitting.
An impressed current cathodic protection electrode, comprised substantially of a high alloy stainless steel comprising 45-70% iron, greater than 6% molybdenum, the electrode being resistant to corrosion and pitting.
An impressed current cathodic protection electrode for use in underwater and/or underground applications to protect against oxidation, the electrode comprised substantially entirely of a high alloy stainless steel including 45-70% iron, the electrode being substantially carbon free and resistant to corrosion and pitting.
Dependencies are inferred from the claim text.