US949575A - Method of treating iron or steel articles. - Google Patents
Method of treating iron or steel articles. Download PDFInfo
- Publication number
- US949575A US949575A US52836909A US1909528369A US949575A US 949575 A US949575 A US 949575A US 52836909 A US52836909 A US 52836909A US 1909528369 A US1909528369 A US 1909528369A US 949575 A US949575 A US 949575A
- Authority
- US
- United States
- Prior art keywords
- articles
- metal
- steel articles
- treating iron
- 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
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title description 10
- 238000000034 method Methods 0.000 title description 7
- 229910000831 Steel Inorganic materials 0.000 title description 5
- 229910052742 iron Inorganic materials 0.000 title description 5
- 239000010959 steel Substances 0.000 title description 5
- 229910052751 metal Inorganic materials 0.000 description 9
- 239000002184 metal Substances 0.000 description 9
- 239000002253 acid Substances 0.000 description 7
- 238000000576 coating method Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 239000004519 grease Substances 0.000 description 3
- 239000012670 alkaline solution Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 239000003792 electrolyte Substances 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005246 galvanizing Methods 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052783 alkali metal Inorganic materials 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 230000002688 persistence Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000010517 secondary reaction Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
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
- This invention relates to the preparation of sheets or other forms of iron and steel for tinning or galvanizing.
- the object of the present invention is the provision of a more rapid and etl'ective method of securing complete anti certain elimination of such acid conditions, and in general a more complete pietection of coated surfaces from corrosive influences, than is racticable'by known methods, in the case of with alkaline so utions.
- the iron or steelarticles are first freed from scale by the usual methods, as"by, immersion acid pickling bath.
- the articles are then immersed, preferably after a brief Washing or rinsing with water or a suitable alkaline solution, in an alkaline electrolyte, being connectetl therein as the cathode.
- electroiytes solutions containing a carbonate or for example ickled plates, by washing Specification of Letters Patent.
- the electrolytic treatment is a 'iplietl to sheets or articles which have already undergone a cleaning operation, and which by reason of their -freeclom from scale or grease are highly susceptible to corrosion, the purpose of the treatment being to render the plates e articles less liable to subsequent pitting or corrosion and to secure in a rapid anal certain manner the elimination of all residual acid conditions and the provision oi" a surface which is capable of receiving, by the usual coating methods, a moreperlm". film of coating metal.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
- Coating With Molten Metal (AREA)
Description
OF BQSTGN,
llfD tTAT FATE-El i tll l ilfifii MASSACHUSETTS.
METHGZD 03F TREATING IREN STEEL ARTICLES.
Flo Drawing.
To all whom "it may concern:
Be it known that l, Haney HOWARD, i citizen of the Uniteti States, resitlin at Boston, in the county of Sutlollt antl btate of Massachusetts,have invented certain new and useful Improvements in Methods of Treating Iron '01 Steel Articles. of which the following: is a specification.
This invention relates to the preparation of sheets or other forms of iron and steel for tinning or galvanizing.
it is well known that tinned plates are very frequently imperfect by reason of the presence of minute uncot'eretl areas, pea-fora tions, or so-calletl "pin holes inthe coatng metal,
such imperftarlions beingfhi ghly detrimental by reason of the tendency of the coated metal to become eorrotletl or pitted at these points or areas. While all surfaces otiron or steel which have been thoroughly cleaned and freed from grease or oxid are very susceptible to oxidation or LQIlQSlOIl, suci imperfections are particularly liable to occur in plates which have been SllllJQClttl to an acid pickljngprocess; and their pres ence may in this case be partly or wholly attributed to the persistence in the metal to be coated of acid conditions arising from the baths employed for the removal of the scale.
The object of the present invention is the provision of a more rapid and etl'ective method of securing complete anti certain elimination of such acid conditions, and in general a more complete pietection of coated surfaces from corrosive influences, than is racticable'by known methods, in the case of with alkaline so utions.
According to the preferred embodiment of the invention, the iron or steelarticles are first freed from scale by the usual methods, as"by, immersion acid pickling bath. The articles are then immersed, preferably after a brief Washing or rinsing with water or a suitable alkaline solution, in an alkaline electrolyte, being connectetl therein as the cathode. As electroiytes, solutions containing a carbonate or for example ickled plates, by washing Specification of Letters Patent.
for a suitable time in an hytlrortizl of an alkali are Patented iteh. l5,
Application filed November 16, will). Serial lilo. 528,389.
lilOS'i Stumble. i'ln electric current nissetl to the sheet or other article as cathode, resulting in the deposition or separation of the alkali metal, and by secondary reaction of-this metal with the water of the SOl'tlllOll, in an evolution of hydrogen at the surface of the metal. By this procedure the cleaned surfaces are rentleretl far less liable to cmrrosion, any residual aeitl conditions are quickly eliminated, and the metal may inunetliately receive a coating of tin or zinc by ininiersion in the molten? metal in the usual waf l am aware that it has been proposetl'to clean metal sheets, preliniiiairy to coating theni, by eouneetii'igthenras cathode in acid or alkaline solutions, but in such cases the purpose has been to atilize the evolved gas for the mechanical removal of scale, grease anti the like. that is to say for cleaning the. plates; whereas according, to the present inrention the electrolytic treatment is a 'iplietl to sheets or articles which have already undergone a cleaning operation, and which by reason of their -freeclom from scale or grease are highly susceptible to corrosion, the purpose of the treatment being to render the plates e articles less liable to subsequent pitting or corrosion and to secure in a rapid anal certain manner the elimination of all residual acid conditions and the provision oi" a surface which is capable of receiving, by the usual coating methods, a moreperlm". film of coating metal.
l claim The, method oi preparing iron and. steel articles for tinnine: or galvanizing, which consists in subjecting the articles to an acid pickling proc 5%; to remove the scale and thereafter pas. mg an electric current to the cleaned articles connected as catholic in an alkaline electrolyte.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US52836909A US949575A (en) | 1909-11-16 | 1909-11-16 | Method of treating iron or steel articles. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US52836909A US949575A (en) | 1909-11-16 | 1909-11-16 | Method of treating iron or steel articles. |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US949575A true US949575A (en) | 1910-02-15 |
Family
ID=3017989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US52836909A Expired - Lifetime US949575A (en) | 1909-11-16 | 1909-11-16 | Method of treating iron or steel articles. |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US949575A (en) |
-
1909
- 1909-11-16 US US52836909A patent/US949575A/en not_active Expired - Lifetime
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