Anti-coking nanomaterial based on stainless steel surface, and preparation method therefor
AssigneeShenzhen Candortech Incorporated Company
InventorChao Chen
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Abstract
An anti-coking nanomaterial based on a stainless steel surface. In percentage by weight, the nanomaterial comprises: 0 to 3% of carbon, 23% to 38% of oxygen, 38% to 53% of chromium, 10% to 35% of ferrum, 0 to 2% of molybdenum, 0 to 4% of nickel, 3.5 to 5% of silicon, 0 to 1% of calcium, and the balance of impurity elements. Also disclosed are a preparation method for the anti-coking nanomaterial, the anti-coking nanomaterial that is based on a stainless steel surface and that is prepared by using the preparation method, and a stainless steel substrate comprising the anti-coking nanocrystalline material.
Claims6
A method for preparing an anti-coking nanocrystalline material characterized in that the method comprises the following steps:
- (1) chemically degreasing and etching with alkali a stainless steel surface using a sodium hydroxide solution and a solution containing an alkali etching additive, followed by washing with water;
- (2) oxidizing the stainless steel surface treated in the step (1) by an oxidizing solution, followed by washing with water;
- (3) immersing the stainless steel surface treated in the step (2) as a cathode in an electrolyte to electrolyze, followed by washing with water;
- and
- (4) placing the stainless steel surface treated in the step (3) at a temperature of 50-60° C. and a humidity of 60-70%, and then placing at a temperature of 35-40° C. and a humidity of 40-50% for hardening.
Dependencies are inferred from the claim text.