US1324317A - Iron and steel - Google Patents
Iron and steel Download PDFInfo
- Publication number
- US1324317A US1324317A US1324317DA US1324317A US 1324317 A US1324317 A US 1324317A US 1324317D A US1324317D A US 1324317DA US 1324317 A US1324317 A US 1324317A
- Authority
- US
- United States
- Prior art keywords
- iron
- steel
- fluorid
- sulfate
- electrolytic
- 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
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title description 36
- 229910052742 iron Inorganic materials 0.000 title description 18
- 229910000831 Steel Inorganic materials 0.000 title description 16
- 239000010959 steel Substances 0.000 title description 16
- QAOWNCQODCNURD-UHFFFAOYSA-L sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 14
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 12
- KRHYYFGTRYWZRS-UHFFFAOYSA-N HF Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N HCl Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 4
- FYYHWMGAXLPEAU-UHFFFAOYSA-N magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 4
- 239000011777 magnesium Substances 0.000 description 4
- 229910052749 magnesium Inorganic materials 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 4
- 229910052700 potassium Inorganic materials 0.000 description 4
- 239000011591 potassium Substances 0.000 description 4
- KEAYESYHFKHZAL-UHFFFAOYSA-N sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 4
- 239000011734 sodium Substances 0.000 description 4
- 229910052708 sodium Inorganic materials 0.000 description 4
- 239000002023 wood Substances 0.000 description 4
- 241000658540 Ora Species 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 239000004411 aluminium Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminum Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 2
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F1/00—Electrolytic cleaning, degreasing, pickling or descaling
Definitions
- timers are Parana? ora ion.
- My invention relates to a process for an electrolytic method of cleaning iron and steel.
- the sulfate employed is preferably any one or more of the sulfates of aluminium, magnesium, sodium, or potassium; and the fluorid may be any one or more of the soluble fluorids of magnesium, sodium or potassium, or even hydrofluoric acid may be substituted for the metallic fiuorid, but I prefer the metallic fluorid. It will be ob vious that neither a sulfate nor a fluorid of any metal which would be liberated by the current should be employed. .Broadly' speaking, the deeper the coating of rust or scale to be removed, the greater should be the proportion of fluorid employed, but I do not at any time use more fiuorid than I do sulfate.
- the current density required depends on the quantity of scale or rust to be removed but I have found a current density of from 10 to 30 amperes per square foot to be a con- Venient current to employ. If it is desired to-diminish the time required to carry out the operation, the conductivity of the elec-,
- t'rolyte may be increased by employing a larger proportion of fluorid than would otherwise be used, or by adding commercial hydrofluoric acid equal in amount to from 5 to 20 per cent. by Volume of the electro-' lyte.
- the temperature of the electrolytic bath should always be raised to 150 degrees or 180 degrees Fahrenheit. I have found it possible to Work with a current density up to 100 amperes per square foot.
- the iron or steel article to be cleaned is made the cathode and the anode may be carbon or'lead.
- the most suitable vats or tanks .for carrying out the process are those made of wood, or Wood lined with lead.
- I claim 1 An electrolytic method for removing scale or rust from iron or steel which consists in making the iron to be cleaned a cathode of the electrolytic circuit, and immersing the same in an electrolytic bath consisting of a solution of soluble sulfate and a soluble fluorid.
- An electrolytic method for removing scale or rust from iron or steel which consists in making cathode of the electrolytic circuit, and immersing the same in an electrolytic bath consisting of a solution containing a soluble sulfate and a soluble fluorid in the proportion of three to one.
Description
timers are Parana? ora ion.
QUINTIN MARINO, F HENDON, ENGLAND.
ELECTROLYTIC METHOD OF CLEANING IRON AND STEEL.
No Drawing.
, is a specification.
My invention relates to a process for an electrolytic method of cleaning iron and steel. I
.The method of removing scale or rust from iron or steel hitherto usually adopted,
has been to immerse the article to be cleaned in dilute hydrochloric or sulfuric acid. This method is defective in that the iron or steel article is also attacked.
According to my invention, I remove the scale or rust byv an electrolytic method which accomplishes the desired object in much quicker time than the ordinary acid method, and does not injure the iron or steel.
The electrolyte Iemploy a solution of a sulfate and a fluorid of, say, about 20 to 25 Baum strength generally in the proportion of one partof fluorid to three parts of sulfate. The sulfate employed is preferably any one or more of the sulfates of aluminium, magnesium, sodium, or potassium; and the fluorid may be any one or more of the soluble fluorids of magnesium, sodium or potassium, or even hydrofluoric acid may be substituted for the metallic fiuorid, but I prefer the metallic fluorid. It will be ob vious that neither a sulfate nor a fluorid of any metal which would be liberated by the current should be employed. .Broadly' speaking, the deeper the coating of rust or scale to be removed, the greater should be the proportion of fluorid employed, but I do not at any time use more fiuorid than I do sulfate.
Specification of Letters Patent.
Patented Dec, 9, 19319.
Application filed August 11, 1919. Serial No. 316,779.
The current density required depends on the quantity of scale or rust to be removed but I have found a current density of from 10 to 30 amperes per square foot to be a con- Venient current to employ. If it is desired to-diminish the time required to carry out the operation, the conductivity of the elec-,
t'rolyte may be increased by employing a larger proportion of fluorid than would otherwise be used, or by adding commercial hydrofluoric acid equal in amount to from 5 to 20 per cent. by Volume of the electro-' lyte. The temperature of the electrolytic bath should always be raised to 150 degrees or 180 degrees Fahrenheit. I have found it possible to Work with a current density up to 100 amperes per square foot.
The iron or steel article to be cleaned is made the cathode and the anode may be carbon or'lead. The most suitable vats or tanks .for carrying out the process are those made of wood, or Wood lined with lead.
I claim 1. An electrolytic method for removing scale or rust from iron or steel which consists in making the iron to be cleaned a cathode of the electrolytic circuit, and immersing the same in an electrolytic bath consisting of a solution of soluble sulfate and a soluble fluorid.
2. An electrolytic method for removing scale or rust from iron or steel which consists in making cathode of the electrolytic circuit, and immersing the same in an electrolytic bath consisting of a solution containing a soluble sulfate and a soluble fluorid in the proportion of three to one.
In testimony whereof I have aflixed my signature hereto this 18th day of July, 1919.
QUINTIN MARINO.
the iron to be cleaned a
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1324317A true US1324317A (en) | 1919-12-09 |
Family
ID=3391768
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US1324317D Expired - Lifetime US1324317A (en) | Iron and steel |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1324317A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2615840A (en) * | 1947-06-06 | 1952-10-28 | Chapman Alfred Arthur Grahame | Electrolytic method to remove rust |
| US3025225A (en) * | 1959-10-05 | 1962-03-13 | Boeing Co | Electrolytic acid descaling of metals |
-
0
- US US1324317D patent/US1324317A/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2615840A (en) * | 1947-06-06 | 1952-10-28 | Chapman Alfred Arthur Grahame | Electrolytic method to remove rust |
| US3025225A (en) * | 1959-10-05 | 1962-03-13 | Boeing Co | Electrolytic acid descaling of metals |
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