PROPERTY ENHANCEMENT OF SURFACES BY ELECTROLYTIC MICRO ARC OXIDATION

摘要

Embodiments of the present technology may include a method of improving tribological and corrosion properties of an oilfield tubular for conveying hydrocarbons. The method may include depositing a first layer comprising aluminum over a substrate. The substrate may include a ferrous alloy. The method may also include immersing the substrate and the first layer in an alkaline electrolytic liquid bath. The method may further include oxidizing a first portion of the first layer by micro arc oxidation to form a second layer over a second portion of the first layer. The second layer may include aluminum oxide. The oilfield tubular may include the substrate, the first layer, and the second layer.

主权项

1. A method of making a product for oilfield applications, the method comprising:
depositing a first layer over a substrate, wherein: the substrate comprises a first material selected from the group consisting of a ferrous alloy, nickel alloy, copper alloy, titanium alloy, cobalt alloy, aluminum alloy, and magnesium alloy, and the first layer comprises a second material selected from the group consisting of magnesium, titanium, and an alloy comprising aluminum and magnesium; and oxidizing a first portion of the first layer by micro arc oxidation to form a second layer over a second portion of the first layer, wherein the second layer comprises an oxide of the second material.