SU823458A1 - Method of producing chrome platings - Google Patents
Method of producing chrome platings Download PDFInfo
- Publication number
- SU823458A1 SU823458A1 SU792802656A SU2802656A SU823458A1 SU 823458 A1 SU823458 A1 SU 823458A1 SU 792802656 A SU792802656 A SU 792802656A SU 2802656 A SU2802656 A SU 2802656A SU 823458 A1 SU823458 A1 SU 823458A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- annealing
- coatings
- hydrogen
- purity
- chromium
- Prior art date
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Classifications
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- 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
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/06—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material
- C23C16/18—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes characterised by the deposition of metallic material from metallo-organic compounds
-
- 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
- C23C16/00—Chemical coating by decomposition of gaseous compounds, without leaving reaction products of surface material in the coating, i.e. chemical vapour deposition [CVD] processes
- C23C16/56—After-treatment
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- 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)
- Chemical Vapour Deposition (AREA)
- Physical Vapour Deposition (AREA)
- Electroplating Methods And Accessories (AREA)
Description
Изобретение относитс к получению по крытий из газовой фазы, в частности R по пучению хромовых покрытий высокой степени чистоты пиролизом металлоорганическвх соединений. Известен способ получени хромовых покрытий, включающий осаждение хрома пиролизом хромоорганических соединений и обезуглероживающий отжиг в сухом в6дороде ij. Недостатком этого способа вп етсй низка производительность. Так, если очистки О,1 г хромового покрыти от углерода до содержани его в покрытии О,1 вес.% требуетс 30 ч, то дл 5О г отжиг в течение 12О ч обеспечивает очистку от углерода лишь до 1,1 вес.%, а дл снижени содержани углерода менее ОД .вес.% требуютс сотни часе®. Наиболее близким к изобретению вл етс способ получени хромовых покры- .тий газофазным осаждением с последук шим от-жигом покрытий во влажном водо роде при , обезуглероживани значительно ускор етс 2j. Однако эа счет взаимодействи храма с парами воды о аауетс окисна пленка, котора затормаживает процесс обезуглероживани и пошлшает количество кислорода в покрытии. Цель изобретени - повышение чистоты покрытий и йроизводите1н ности процесса. Поставленна цель достигаетс тем, что обезуглероживающий отжиг хромовых покрытий, полученных пиролизом хромовр- ганических соединений, ведут при 11ООiSGO C циклически по влажном и сухом водороде, при этом врем отжига во влажном водороде составл ет 1-5 в сухом 3-1О ч, а количество циклов 2-4. Врем обработки во влажном водороде выбираетс с таким .-расчетом, что слой (жиси хрома составл ет не более 1-3 мкм. Так как ветаачина окисной пленки зависит от времени отжига и его температуры, то с повышением температуры это врем уменьшаетс .The invention relates to the preparation of coatings from the gas phase, in particular R, by the heaving of high purity chromium coatings by the pyrolysis of organometallic compounds. A method of producing chromium coatings is known, including the precipitation of chromium by the pyrolysis of chromo-organic compounds and decarburization annealing in a dry ij. The disadvantage of this method is low productivity. So, if O purification, 1 g of chrome plating from carbon to its content in O coating, 1 wt.% Takes 30 h, then for 5O g, annealing for 12 O h ensures carbon removal only to 1.1 wt.%, And hundreds of hours® are required to reduce the carbon content to less than 100% by weight. Closest to the invention is a method for producing chromium coatings by gas-phase deposition followed by annealing of coatings in humid hydrogen during decarburization is significantly accelerated by 2j. However, by reacting the temple with water vapor, the oxide film, which decelerates the decarburization and absorbs the amount of oxygen in the coating, is damaged. The purpose of the invention is to increase the purity of the coatings and the productivity of the process. The goal is achieved by the fact that the decarburization annealing of chromium coatings obtained by the pyrolysis of chromogenic compounds is carried out at 11OOiSGO C cyclically on wet and dry hydrogen, while the annealing time in wet hydrogen is 1-5 in dry 3-1 O h, and the amount cycles 2-4. The processing time in wet hydrogen is chosen so that the layer (the chromium content is no more than 1-3 µm. Since the oxide film depends on the annealing time and its temperature, this time decreases with increasing temperature.
Продолжительность отжига покрытий во влажном водороде в интервале 11ООISOO C бопее 5 ч нецопуйтима резкого увеличени , толщины окисленного сло , а менее 1 ч - нецелесообразна, так как ухудшаетс технологичность проаесса .The duration of the annealing of coatings in humid hydrogen in the range of 11OOISOO C more than 5 hours is not possible with a sharp increase in the thickness of the oxidized layer, and less than 1 hour is impractical because the processability of the process deteriorates.
Врем отжига хромовых покрытий в сухом водороде определ етс временем восстановлени тонкой окисной пленки 3ч при 13ОО®С и 8-10 ч при .The annealing time of chromium coatings in dry hydrogen is determined by the reduction time of a thin oxide film for 3 hours at 13OO® C and from 8 to 10 hours at.
Количество циклов определ етс как температурой прсщесса, так и толщиной покрыта . Менее чем за. 2 цикла обезуглеродить хромовое покрытие До содержани уг ерода менее О,1 вес.% не удаетс а более чем 4 цикла проводить нецелесообразно , так как за 4 цикла достигаетс обезуглероживание сравнительно толстых покрытий («о О,3 мм).The number of cycles is determined by both the temperature of the process and the thickness covered. Less than. 2 cycles decarbonate chrome plating. Up to a carbon content of less than 0, 1 wt.% Cannot be done and more than 4 cycles are impractical, since decarburization of relatively thick coatings (о O, 3 mm) is achieved in 4 cycles.
Пример, Хромовое покрытие нанос т на частицы окиси алюмини раз lepoM 400-1OQO мкм. Пиролизу подвергают бис-этилеензолхром в атмосфере инертного газа (аргона или гели ) при 350 - .Частицы при этом привод тс в псевдо-. ожиженное состо ние путем механического встр хивани камеры с частицами наFor example, a chromium coating is applied to alumina particles once a time lepoM 400-1OQO microns. The pyrolysis is subjected to bis-ethylene-benzene in an atmosphere of inert gas (argon or helium) at 350 -. The particles are in this case pseudo-. liquefied state by mechanical shaking of the chamber with particles on
вибростенде. Частота вибрации 5О-7О Гц. Толщина Покрыти при этом 50-70 мкм.shake table. The frequency of vibration 5O-7O Hz. The thickness of the coating with 50-70 microns.
Частицы с нанесенным покрытием отжигаютс в атмосфере водорода, вначале увлажненного посредством барбот 1ровани The coated particles are annealed in a hydrogen atmosphere, initially moistened by bubbling
через воду, затем сухого, затем снова увлажненного и т.д. Количество циклов (влажный водород - сухой водород) -2-4. В таблице представлены услови проведени и результаты отжигов, осуществленнь1х предлагаемым способом.through water, then dry, then again moistened, etc. The number of cycles (wet hydrogen - dry hydrogen) -2-4. The table presents the conditions and results of annealing carried out by the proposed method.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792802656A SU823458A1 (en) | 1979-07-24 | 1979-07-24 | Method of producing chrome platings |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU792802656A SU823458A1 (en) | 1979-07-24 | 1979-07-24 | Method of producing chrome platings |
Publications (1)
Publication Number | Publication Date |
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SU823458A1 true SU823458A1 (en) | 1981-04-23 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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SU792802656A SU823458A1 (en) | 1979-07-24 | 1979-07-24 | Method of producing chrome platings |
Country Status (1)
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SU (1) | SU823458A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2741556C1 (en) * | 2020-07-20 | 2021-01-26 | Пикосан Ой | Precipitation reactor for coating particles and corresponding method |
-
1979
- 1979-07-24 SU SU792802656A patent/SU823458A1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2741556C1 (en) * | 2020-07-20 | 2021-01-26 | Пикосан Ой | Precipitation reactor for coating particles and corresponding method |
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