MD3708G2 - Process for enhancing the corrosion resistance of steel - Google Patents
Process for enhancing the corrosion resistance of steel Download PDFInfo
- Publication number
- MD3708G2 MD3708G2 MDA20070148A MD20070148A MD3708G2 MD 3708 G2 MD3708 G2 MD 3708G2 MD A20070148 A MDA20070148 A MD A20070148A MD 20070148 A MD20070148 A MD 20070148A MD 3708 G2 MD3708 G2 MD 3708G2
- Authority
- MD
- Moldova
- Prior art keywords
- steel
- enhancing
- machining
- corrosion resistance
- nh4cl
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 title abstract 5
- 239000010959 steel Substances 0.000 title abstract 5
- 238000005260 corrosion Methods 0.000 title abstract 3
- 230000007797 corrosion Effects 0.000 title abstract 3
- 230000002708 enhancing effect Effects 0.000 title abstract 3
- 238000000034 method Methods 0.000 title abstract 2
- 238000003754 machining Methods 0.000 abstract 3
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 abstract 2
- 238000005275 alloying Methods 0.000 abstract 2
- 235000019270 ammonium chloride Nutrition 0.000 abstract 2
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 abstract 2
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 abstract 1
- 235000011114 ammonium hydroxide Nutrition 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000011089 mechanical engineering Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 235000010344 sodium nitrate Nutrition 0.000 abstract 1
Landscapes
- Heat Treatment Of Articles (AREA)
- Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
- Heat Treatment Of Steel (AREA)
Abstract
The invention relates to the thermochemical machining of steel articles and can be used in mechanical engineering and instrument engineering for enhancing the corrosion resistance of machine parts, instruments and machining attachments.The process for enhancing the corrosion resistance of steel consists in that at first the steel article is subjected to electrospark alloying with a corrosion-resistance metal, with the specific time of alloying of 1 min/cm2, with the electric discharge energy in the range of 0,3…4,0 J. Then it is carried out the thermochemical machining, consisting in the anode heating of the steel article during 30 s into an electrolyte containing nitric compounds NH4Cl 100 g/l and NH4OH 50 g/l or NH4Cl 110 g/l and NaNO3 110 g/l, up to the temperature of 750°C, at the voltage between electrodes of 150…220 V, with the current density of 1…15 A/cm2 and subsequent cooling in the open air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20070148A MD3708G2 (en) | 2007-05-23 | 2007-05-23 | Process for enhancing the corrosion resistance of steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| MDA20070148A MD3708G2 (en) | 2007-05-23 | 2007-05-23 | Process for enhancing the corrosion resistance of steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| MD3708F1 MD3708F1 (en) | 2008-09-30 |
| MD3708G2 true MD3708G2 (en) | 2009-04-30 |
Family
ID=39812063
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| MDA20070148A MD3708G2 (en) | 2007-05-23 | 2007-05-23 | Process for enhancing the corrosion resistance of steel |
Country Status (1)
| Country | Link |
|---|---|
| MD (1) | MD3708G2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD192Z (en) * | 2009-06-04 | 2010-11-30 | Институт Прикладной Физики Академии Наук Молдовы | Process for thermochemical treatment of steel articles |
| MD307Z (en) * | 2010-04-27 | 2011-07-31 | Институт Прикладной Физики Академии Наук Молдовы | Inhibitor of steel corrosion in the water |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD561Z (en) * | 2012-02-08 | 2013-06-30 | Институт Прикладной Физики Академии Наук Молдовы | Process for anticorrosion machining of steel |
| MD614Z (en) * | 2012-07-03 | 2013-10-31 | Институт Прикладной Физики Академии Наук Молдовы | Process for chemicothermal treatment of steel products |
| MD685Z (en) * | 2013-02-13 | 2014-05-31 | Институт Прикладной Физики Академии Наук Молдовы | Process for producing a multilayer coating by the electrospark alloying method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD2959B1 (en) * | 2004-06-29 | 2006-01-31 | Institutul De Fizica Aplicata Al Academiei De Stiinte A Republicii Moldova | Process for steel article working for anticorrosive superficial layer obtaining |
-
2007
- 2007-05-23 MD MDA20070148A patent/MD3708G2/en not_active IP Right Cessation
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD2959B1 (en) * | 2004-06-29 | 2006-01-31 | Institutul De Fizica Aplicata Al Academiei De Stiinte A Republicii Moldova | Process for steel article working for anticorrosive superficial layer obtaining |
Non-Patent Citations (3)
| Title |
|---|
| Гитлевич А.Е., Михайлов В.В., Парканский Н.Я., Ревуцкий В.М. Электроискровое легирование металлических поверхностей. Кишинев, 1985 * |
| Паршутин В.В., Ревенко В.Г., Пасиновский Е.А., Шкурпело А.И., Житару Р.П. Влияние способа ввода азота на электрохимическое, коррозионное поведение и физико-механические свойства модифицированных поверхностей сталей. Электронная обработка материалов, 2004, № 4. c. 14-33 * |
| Чернова Г.П., Богдашкина Н.Л., Паршутин В.В. и др. Электрохимическое и коррозионное поведение стали 40Х, азотированной в «электролитной плазме». Защита металлов, 1984, № 3. c. 406-411 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| MD192Z (en) * | 2009-06-04 | 2010-11-30 | Институт Прикладной Физики Академии Наук Молдовы | Process for thermochemical treatment of steel articles |
| MD307Z (en) * | 2010-04-27 | 2011-07-31 | Институт Прикладной Физики Академии Наук Молдовы | Inhibitor of steel corrosion in the water |
Also Published As
| Publication number | Publication date |
|---|---|
| MD3708F1 (en) | 2008-09-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FG4A | Patent for invention issued | ||
| KA4A | Patent for invention lapsed due to non-payment of fees (with right of restoration) | ||
| MM4A | Patent for invention definitely lapsed due to non-payment of fees |