Inhibitor-containing metal particles by mechanical alloying

Patent metadata

Field	Value
Publication number	US-11414726-B2
Application number	US-201916295494-A
Country	US
Kind code	B2
Filing date	Mar 7, 2019
Priority date	Mar 7, 2018
Publication date	Aug 16, 2022
Grant date	Aug 16, 2022

Abstract

A method of making a metallic material includes mechanically alloying base metal with corrosion inhibitor to thereby form an alloy having the base metal and the corrosion inhibitor. A method of preventing corrosion includes providing the alloy to a process environment, allowing the process environment to corrode or crack the alloy to thereby expose the corrosion inhibitor of the alloy to the process environment, allowing a first ionic component of the corrosion inhibitor to be transformed to a second ionic component, and allowing the second ionic component to be repassivated with the alloy to thereby prevent further corrosion or cracking of the alloy.

First claim

What is claimed is:

1. A method of making a metallic material, the method comprising steps of
mechanically alloying base metal powder with corrosion inhibitor powder to thereby form an alloy powder having from 80 to 99.5 weight percent of the base metal and from 5 to 20 weight percent of the corrosion inhibitor, wherein the base metal has a size of from −50 mesh to +100 mesh, wherein the mechanically alloying step is high energy ball milling, where the alloy powder has a solute concentration of the corrosion inhibitor powder of larger than 50%,
compacting the alloy powder to thereby form alloy compacts, wherein the compacting step is a cold compacting step occurring without an applied heat source, wherein the step of compacting occurs at a pressure at least above 1 GPa, wherein the compacting step is a step of pelletization such that the alloy compacts are alloy pellets, such that the alloy pellets are formed at the pressure at least above 1 GPa,
wherein the base metal is selected from the group consisting of aluminum (Al), zinc (Zn), magnesium (Mg), and combinations thereof, and
wherein the corrosion inhibitor is selected from the group consisting of sodium chromate (Na 2 CrO 4 ), cerium nitrate (Ce(NO 3 ) 3 ), sodium vanadate (Na 2 VO 4 ), and combinations thereof.

2. The method of claim 1 , wherein the alloy pellets have a diameter in the range of from 0.5 mm to 10 cm.

3. The method of claim 1 , wherein the alloy pellets have a hardness in the range of from 50 HV to 200 HV.

4. A method of making an alloy, the method comprising steps of
combining base metal powder, corrosion inhibitor powder, and grinding balls in a ball mill rotation pot,
rotating the ball mill rotation pot in a disk-planetary ball mill to thereby form an alloy powder having from 80 to 99.5 weight percent of the base metal powder and from 5 to 20 weight percent the corrosion inhibitor powder, wherein the base metal has a size of from −50 mesh to +100 mesh, wherein the disk-planetary ball mill is a high-energy ball mill,
collecting a portion of the alloy powder as an alloy powder product, and
filling a receptacle of a die with a second portion of the alloy powder, and
compacting the second portion of the alloy powder within the die to form alloy compacts, wherein the step of compacting is a cold compacting step occurring without an applied heat source, wherein the step of compacting occurs at a pressure at least above 1 GPa, wherein the compacting step is a step of pelletization such that the alloy compact is an alloy pellet, such that the alloy pellets are formed at the pressure at least above 1 GPa, wherein the base metal powder is selected from the group consisting of aluminum (Al), zinc (Zn), magnesium (Mg), and combinations thereof, and
wherein the corrosion inhibitor powder is selected from the group consisting of sodium chromate (Na 2 CrO 4 ), cerium nitrate (Ce(NO 3 ) 3 ), sodium vanadate (Na 2 VO 4 ), and combinations thereof.

5. The metallic material made by the method of claim 1 .

6. The alloy made by the method of claim 4 .

7. The method of claim 4 , where the alloy powder includes a supersaturation of higher than 30% of the corrosion inhibitor powder.

Assignees

• Gupta Rajeev K
• Khan Mohammad Umar Farooq
• Mirza Farhan
• Esquivel Javier
• Univ Akron

Inventors

• Gupta Rajeev K
• Khan Mohammad Umar Farooq
• Mirza Farhan
• Esquivel Javier

Classifications

• B22F9/04 Primary

  starting from solid material, e.g. by crushing, grinding or milling ({C22C1/1084 takes precedence}; crushing, grinding or milling, in general, see the relevant subclasses, e.g. B02C) · CPC title

• B22F2009/041

  by mechanical alloying, e.g. blending, milling · CPC title

• B22F2009/043

  by ball milling · CPC title

• C22C1/05 Primary

  Mixtures of metal powder with non-metallic powder (C22C1/08 takes precedence) · CPC title