US1715695A - Derusting ferrous metals - Google Patents

Derusting ferrous metals Download PDF

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Publication number
US1715695A
US1715695A US244042A US24404227A US1715695A US 1715695 A US1715695 A US 1715695A US 244042 A US244042 A US 244042A US 24404227 A US24404227 A US 24404227A US 1715695 A US1715695 A US 1715695A
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US
United States
Prior art keywords
pressure
derusting
ferrous metals
rusting
steel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US244042A
Inventor
Cole William Howard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to GB24658/28A priority Critical patent/GB306604A/en
Priority claimed from GB2205327A external-priority patent/GB298328A/en
Application filed by Individual filed Critical Individual
Priority to US244042A priority patent/US1715695A/en
Priority to FR648106D priority patent/FR648106A/en
Application granted granted Critical
Publication of US1715695A publication Critical patent/US1715695A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
    • C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
    • C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
    • C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
    • C23G1/08—Iron or steel
    • C23G1/083—Iron or steel solutions containing H3PO4

Definitions

  • a steel container with a manhole opening the use of an autoclave-or closed vessel cawas made strong enough to withstand high pable ofavithstanding heat and pressure for pressure.
  • This container was furnished rust-proofing and de-rusting ferrous metals. with a pressure gauge, a safety valve and in "Vhat I claim and desire to secure by Letv 15 addition a soft metal plug which would melt ters Patent is if the temperature rose too high, and so re 1. Process of de-rusting and removing lease the pressure, and finally a signal whisscale from; ferrous articles consisting in tle which whistled an alarm when the pres treating them with phosphoric acid so dilute sure inside rose to the predetermined point.

Landscapes

  • Chemical & Material Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
  • Chemical Treatment Of Metals (AREA)
  • Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)

Description

Patented June 4, I I I I UNITED STATES PATENT OFFICE.-
WILLIAM nowm COLE, or rams, rnmcn nnnusrme rnimous METALS.
No Drawing. Original application filed September 20, 1927, Serial No. 220,840; and in Great Britain August 22, 1927. Diyidcd and this application filed December 31, 1927. Serial No. 244,042:
This specification is a division of my specappearance very clean and free from rust. ification Serial No. 220,840, filed th Sep- I do not confine myself to the use of tcmber, 1927. dilute phosphoric acid for de-rusting as de- I have found that by treating rusted iron scribed above, as I find that my high pres- 5 or steel articles with dilute phosphoric acid, sure process gives excellent results with other in an autoclave, at high temperature and ingredients, for the compositions of which I'- pressure, the ruston the said article. is redo not claim. priority, but merely desire, in 40 moved. this respect, to be protected in the use of my The following example will further illushereinbefore described method of treatment 10 trate the nature of the invention. under pressure and high temperature, and
A steel container with a manhole opening the use of an autoclave-or closed vessel cawas made strong enough to withstand high pable ofavithstanding heat and pressure for pressure. This container was furnished rust-proofing and de-rusting ferrous metals. with a pressure gauge, a safety valve and in "Vhat I claim and desire to secure by Letv 15 addition a soft metal plug which would melt ters Patent is if the temperature rose too high, and so re 1. Process of de-rusting and removing lease the pressure, and finally a signal whisscale from; ferrous articles consisting in tle which whistled an alarm when the pres treating them with phosphoric acid so dilute sure inside rose to the predetermined point. that no'coating is left on thearticles treated 20 This whistle alarm was made to be ad ustaina closed vessel, said treatment being carblc for any pressure wanted. In, one exried out at boiling temperature and under periment, after introducing the ingredients pressure greater than atmospheric pressure. and steel and iron pieces to be de-rusted,- 2. Process of de-rusting and removing the pressure arranged for was about 50 scale from ferrous articles consistin in 25 pounds per square inch, the heating had; treating them with phos horic aci so only to be used for a period of about ten dilute that no coating is le on the articles minutes before the whistle gave the alarm treated in a closed vessel, said treatment beand thesource of heat wasturncd off. After ing carried out at a boiling temperature and the pressure vessel had cooled suificiently-to under a pressureof-about 50 pounds per 30 enable it to be opened without'danger, which square inch. i
in this case was about 10 minutes, the auto- In testimony whereof I aflix my signaclave was opened and it was ascertained ture. that the iron and steel pieces treated were in WILLIAM HOWARD COLE.
US244042A 1927-08-22 1927-12-31 Derusting ferrous metals Expired - Lifetime US1715695A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
GB24658/28A GB306604A (en) 1927-08-22 1927-08-22 An improved process for removing rust, scale, dirt, or grease from iron and steel articles
US244042A US1715695A (en) 1927-08-22 1927-12-31 Derusting ferrous metals
FR648106D FR648106A (en) 1927-08-22 1928-02-02 Process for preserving metals and in particular iron and steel from rust, and for removing rust from iron and steel objects

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB2205327A GB298328A (en) 1927-08-22 1927-08-22 Improvements in processes for proofing iron and steel against rust
US22084027A 1927-09-20 1927-09-20
US244042A US1715695A (en) 1927-08-22 1927-12-31 Derusting ferrous metals

Publications (1)

Publication Number Publication Date
US1715695A true US1715695A (en) 1929-06-04

Family

ID=27258080

Family Applications (1)

Application Number Title Priority Date Filing Date
US244042A Expired - Lifetime US1715695A (en) 1927-08-22 1927-12-31 Derusting ferrous metals

Country Status (3)

Country Link
US (1) US1715695A (en)
FR (1) FR648106A (en)
GB (1) GB306604A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3338745A (en) * 1963-07-03 1967-08-29 Grace W R & Co Method for cleaning evaporator tubes
US3375149A (en) * 1948-04-28 1968-03-26 Atomic Energy Commission Usa Plutonium etching process

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2965523A (en) * 1957-02-12 1960-12-20 Dow Chemical Co Scale removal from ferrous metal surfaces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3375149A (en) * 1948-04-28 1968-03-26 Atomic Energy Commission Usa Plutonium etching process
US3338745A (en) * 1963-07-03 1967-08-29 Grace W R & Co Method for cleaning evaporator tubes

Also Published As

Publication number Publication date
FR648106A (en) 1928-12-05
GB306604A (en) 1929-02-22

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