US3054737A - Process and bath for electrosmoothing ferrous metals - Google Patents
Process and bath for electrosmoothing ferrous metals Download PDFInfo
- Publication number
- US3054737A US3054737A US830713A US83071359A US3054737A US 3054737 A US3054737 A US 3054737A US 830713 A US830713 A US 830713A US 83071359 A US83071359 A US 83071359A US 3054737 A US3054737 A US 3054737A
- Authority
- US
- United States
- Prior art keywords
- bath
- gms
- electro
- electrosmoothing
- per litre
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/34—Pretreatment of metallic surfaces to be electroplated
- C25D5/36—Pretreatment of metallic surfaces to be electroplated of iron or steel
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25F—PROCESSES FOR THE ELECTROLYTIC REMOVAL OF MATERIALS FROM OBJECTS; APPARATUS THEREFOR
- C25F3/00—Electrolytic etching or polishing
- C25F3/16—Polishing
- C25F3/22—Polishing of heavy metals
- C25F3/24—Polishing of heavy metals of iron or steel
Definitions
- the porosity of an electro-deposited metal coating on a ferrous surface can be reduced by electro-smoothing the metal to be plated prior to carrying out the electroplating operation.
- electro-smoothing the metal prior to electroplating any high points of the metal surface are removed; if these high points are not removed they tend to receive a disproportionate amount of deposit at the expense of the surrounding areas, which are then less protected against wear and corrosion.
- a process of preparing a ferrous surface for electroplating with another metal which comprises electro-smoothing the surface to be plated in a bath containing acceptor ions with a low diffusion coefficient in order to obtain low limiting current densities for anodic dissolution.
- the present invention provides a process for the production of tinplate in which the steel is electro-smoothed in a bath containing acceptor ions with a low diffusion coeflicient in order to obtain low limiting current densities for anodic dissolution and is thereafter electroplated with tin.
- tinplate it has been found that the number of rust spots formed on exposure to a corrosive atmosphere for a given time was similar for a 4 oz./basis box electro deposit of tin on electro-smoothed mild steel and an 8 oz./basis box electrodeposit on unsmoothed mild steel.
- the bath is preferably operated on the rising portion of the anode potential/current graph just below the horizontal portion corresponding to the limiting current density for anodic dissolution.
- composition of such an electro-smoothing bath in which the citrate anion is employed as the acceptor ion is, for example, as follows:
- the electro-smoothed steel sheets thus obtained were then subjected to a conventional electrolytic tinning operation together with a further sample of the same steel sheet which had not been electro-smoothed.
- the electrodeposited tin coating on the electro-smoothed sheets was less porous than that on the unsmoothed sheet and the tinplate obtained from the electro-smoothed sheets was more corrosion-resistant than that obtained from the unsmoothed sheet.
- a process of preparing low carbon steel for electroplating with another metal which comprises anodically electrosmoothing the surface to be plated in a bath consisting essentially of water and from 49 to 147 gms. sodium citrate (including 2 mols. water of crystallisation) per litre, from 2 to 50 gms. citric acid per litre, and from 5 to 20 gms. sodium chloride per litre, the relative proportions of sodium citrate and citric acid being such that the bath has a pH of from 4.0 to 6.0.
- a process for the production of tinplate which comprises the steps of anodically electrosmoothing low carbon steel in a bath consisting essentially of water and from 49 to 147 gms. sodium citrate (including 2 mols. water of crystallisation) per litre, from 2 to 50 gms. citric acid per litre and from 5 to 20 gms. sodium chloride per litre, the relative proportions of sodium citrate and citric acid being such that the bath has a pH of from 4.0 to 6.0 and then electroplating the steel with tin.
- a bath for electrosmoothing ferrous metals which consists essentially of water and from 49 to 147 gms. sodium citrate (including 2 mols. water of crystallisation) per litre, from 2 to 5 gms. citric acid per litre, and from 2 to 20 gms. sodium chloride per litre, the relative proportions of sodium citrate and citric acid being such that the bath has a pH of from 4.0 to 6.0.
- a process of preparing a low carbon steel surface for electroplating With another metal comprises the steps of immersing the surface to be plated in a bath consisting essentially of an aqueous solution of an organic hydroxy carboxylic acid, a water-soluble salt of an organic hydroxy carboxylic acid and chloride ion, the concentration of said salt being from 0.5 to 1.5 N, the concentration of chloride ion being from 3 to 12 guns/litre, and the concentration of said acid being such that the bath has a pH of from 4.0 to 6.0, and then passing a current between said surface, as anode, and a cathode at an anode current density of from 50 to 150 amps/sq. ft., whereby electro-smoothing of said surface is efiected.
- a process for producing tinpla-te which process comprises the steps of immersing low carbon steel sheet material in a bath consisting essentially of an aqueous solution of an organic hydroxy carboxylic acid and chloride ion, the concentration of said salt being from 0.5 to 1.5 N, the concentration of chloride ion being from 3 to 12 gms./litre, and the concentration of said acid being such that the bath has a pH of "from 4.0 to 6.0, then passing a current between said sheet material, as anode, and a cathode at an anode current density of from to amps/sq. ft., whereby electro-srnoothing of said sheet material is efiected, and thereafter electroplating the sheet material With tin.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Electroplating Methods And Accessories (AREA)
- Electroplating And Plating Baths Therefor (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB25347/58A GB874366A (en) | 1958-08-07 | 1958-08-07 | Improvements in or relating to the treatment of steel surfaces |
Publications (1)
Publication Number | Publication Date |
---|---|
US3054737A true US3054737A (en) | 1962-09-18 |
Family
ID=10226188
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US830713A Expired - Lifetime US3054737A (en) | 1958-08-07 | 1959-07-31 | Process and bath for electrosmoothing ferrous metals |
Country Status (6)
Country | Link |
---|---|
US (1) | US3054737A (ko) |
DE (1) | DE1421960A1 (ko) |
FR (1) | FR1235703A (ko) |
GB (1) | GB874366A (ko) |
LU (1) | LU37495A1 (ko) |
NL (2) | NL122923C (ko) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3975245A (en) * | 1975-12-05 | 1976-08-17 | United Technologies Corporation | Electrolyte for electrochemical machining of nickel base superalloys |
US4264418A (en) * | 1978-09-19 | 1981-04-28 | Kilene Corp. | Method for detersifying and oxide coating removal |
US4904312A (en) * | 1987-08-22 | 1990-02-27 | British Steel Plc | Method of electrolytically etching linear impressions in electrical steel |
US20110120883A1 (en) * | 2009-11-23 | 2011-05-26 | MetCon LLC | Electrolyte Solution and Electropolishing Methods |
US8580103B2 (en) | 2010-11-22 | 2013-11-12 | Metcon, Llc | Electrolyte solution and electrochemical surface modification methods |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1314840A (en) * | 1917-04-30 | 1919-09-02 | Jackson S Weeks | Composition for electrolytes for electrical etching. |
US1334092A (en) * | 1918-07-29 | 1920-03-16 | John L Fay | Method of preparing metal to be galvanized or coated |
US2090966A (en) * | 1931-07-24 | 1937-08-24 | Mead Res Engineering Company | Electrochemistry |
GB483503A (en) * | 1936-10-28 | 1938-04-21 | Crosse & Blackwell Ltd | Improvements in marking metal articles |
US2331721A (en) * | 1939-08-12 | 1943-10-12 | Rustless Iron & Steel Corp | Polishing stainless iron and steel |
US2437474A (en) * | 1944-03-24 | 1948-03-09 | Gilbert H Orozco | Method of anodic cleaning |
US2607722A (en) * | 1947-01-28 | 1952-08-19 | Armco Steel Corp | Electrolytic polishing of stainless steel |
US2799636A (en) * | 1954-03-03 | 1957-07-16 | Coats & Clark | Processing of separable fastener stringers |
US2873233A (en) * | 1956-03-21 | 1959-02-10 | Philco Corp | Method of electrodepositing metals |
-
0
- LU LU37495D patent/LU37495A1/xx unknown
- NL NL241653D patent/NL241653A/xx unknown
- NL NL122923D patent/NL122923C/xx active
-
1958
- 1958-08-07 GB GB25347/58A patent/GB874366A/en not_active Expired
-
1959
- 1959-07-28 DE DE19591421960 patent/DE1421960A1/de active Pending
- 1959-07-29 FR FR801448A patent/FR1235703A/fr not_active Expired
- 1959-07-31 US US830713A patent/US3054737A/en not_active Expired - Lifetime
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1314840A (en) * | 1917-04-30 | 1919-09-02 | Jackson S Weeks | Composition for electrolytes for electrical etching. |
US1334092A (en) * | 1918-07-29 | 1920-03-16 | John L Fay | Method of preparing metal to be galvanized or coated |
US2090966A (en) * | 1931-07-24 | 1937-08-24 | Mead Res Engineering Company | Electrochemistry |
GB483503A (en) * | 1936-10-28 | 1938-04-21 | Crosse & Blackwell Ltd | Improvements in marking metal articles |
US2331721A (en) * | 1939-08-12 | 1943-10-12 | Rustless Iron & Steel Corp | Polishing stainless iron and steel |
US2437474A (en) * | 1944-03-24 | 1948-03-09 | Gilbert H Orozco | Method of anodic cleaning |
US2607722A (en) * | 1947-01-28 | 1952-08-19 | Armco Steel Corp | Electrolytic polishing of stainless steel |
US2799636A (en) * | 1954-03-03 | 1957-07-16 | Coats & Clark | Processing of separable fastener stringers |
US2873233A (en) * | 1956-03-21 | 1959-02-10 | Philco Corp | Method of electrodepositing metals |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3975245A (en) * | 1975-12-05 | 1976-08-17 | United Technologies Corporation | Electrolyte for electrochemical machining of nickel base superalloys |
US4264418A (en) * | 1978-09-19 | 1981-04-28 | Kilene Corp. | Method for detersifying and oxide coating removal |
US4904312A (en) * | 1987-08-22 | 1990-02-27 | British Steel Plc | Method of electrolytically etching linear impressions in electrical steel |
US20110120883A1 (en) * | 2009-11-23 | 2011-05-26 | MetCon LLC | Electrolyte Solution and Electropolishing Methods |
US8357287B2 (en) | 2009-11-23 | 2013-01-22 | MetCon LLC | Electrolyte solution and electropolishing methods |
CN105420805A (zh) * | 2009-11-23 | 2016-03-23 | 梅特康有限责任公司 | 电解质溶液和电抛光方法 |
US8580103B2 (en) | 2010-11-22 | 2013-11-12 | Metcon, Llc | Electrolyte solution and electrochemical surface modification methods |
US9499919B2 (en) | 2010-11-22 | 2016-11-22 | MetCon LLC | Electrolyte solution and electrochemical surface modification methods |
Also Published As
Publication number | Publication date |
---|---|
LU37495A1 (ko) | |
DE1421960A1 (de) | 1969-01-09 |
NL122923C (ko) | |
FR1235703A (fr) | 1960-07-08 |
NL241653A (ko) | |
GB874366A (en) | 1961-08-02 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS6015716B2 (ja) | 錫または錫合金電気めつき用浴の安定化方法 | |
US3989604A (en) | Method of producing metal strip having a galvanized coating on one side | |
US1608694A (en) | Corrosion-resistant article and method of making the same | |
DE1094245B (de) | Bleidioxyd-Elektrode zur Verwendung bei elektrochemischen Verfahren | |
US2693444A (en) | Electrodeposition of chromium and alloys thereof | |
DE1300414B (de) | Gegenstand, vorzugsweise aus Eisenmetall, mit einem dichten, festhaftenden, glaenzenden Korrosionsschutzueberzug aus einer Aluminium-Mangan-Legierung sowie Verfahren zu dessen Herstellung | |
Smirnova et al. | Study of anode processes during development of the new complex thiocarbamide-citrate copper plating electrolyte | |
US3054737A (en) | Process and bath for electrosmoothing ferrous metals | |
US3933605A (en) | Non-polluting pickling method | |
US3959099A (en) | Electrolytic method of producing one-side-only coated steel | |
US3268422A (en) | Electroplating bath containing aluminum and manganese-bearing materials and method of forming aluminummanganese alloy coatings on metallic bases | |
JPS58177494A (ja) | アルミニウム被覆部品の陽極酸化浴および陽極酸化方法 | |
US2075623A (en) | Zinc plating | |
US3729396A (en) | Rhodium plating composition and method for plating rhodium | |
US3111464A (en) | Electrodeposition of chromium and chromium alloys | |
US4167459A (en) | Electroplating with Ni-Cu alloy | |
US4518474A (en) | Device for the electrolytic treatment of metal strip | |
US2241585A (en) | Process for removing metallic coatings from metallic parts | |
US2646397A (en) | Electroplating zinc using titanium containing electrolyte | |
US1566984A (en) | Electroplating method and electroplated articles | |
ATE138115T1 (de) | Bad und elektrolytisches verfahren zur aufbringung einer dünnen beschichtung aus einer eisen-zink-legierung mit einem hohen eisengehalt auf ein galvanisiertes legierungsubstrat | |
US3374156A (en) | Electro-depositing stainless steel coatings on metal surfaces | |
US2057475A (en) | Electrodeposition of rhodium | |
US3446717A (en) | Cathodic treatment of metals in chromate solution to form protective coating thereon | |
GB1070343A (en) | Improvements in or relating to the formation of metal coatings by electro-deposition |