SU827613A1 - Method of zinc surface passivation - Google Patents

Method of zinc surface passivation Download PDF

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Publication number
SU827613A1
SU827613A1 SU782614006A SU2614006A SU827613A1 SU 827613 A1 SU827613 A1 SU 827613A1 SU 782614006 A SU782614006 A SU 782614006A SU 2614006 A SU2614006 A SU 2614006A SU 827613 A1 SU827613 A1 SU 827613A1
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SU
USSR - Soviet Union
Prior art keywords
zinc surface
zinc
surface passivation
passivation
aqueous solution
Prior art date
Application number
SU782614006A
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Russian (ru)
Inventor
Наталья Александровна Мерекина
Евгений Матвеевна Романова
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Всесоюзный Научно-Исследовательскийинститут Метизной Промышленности
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Priority to SU782614006A priority Critical patent/SU827613A1/en
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Publication of SU827613A1 publication Critical patent/SU827613A1/en

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Description

соб) и молибдатиой пленкой после обработки в 3%-ном растворе хлористого патри  (NaCl) (сразу после пассивировани  и через 24 часа испытаний путем периодического погружени  в 3%-пый раствор NaCl). Испытани  показывают, что э.чектрохиыическа  активность цинкового покрыти  после дополнптельной обработки уменьшаетс  в разпой степени. Потенциал пипкового покрыти , обработа ппого электрохимически в молпбдатных растворах на 50-80 мВ положительиее потенциала непассивированного цинкового покрыти , а потепциал цинкового покрыти , обработанного в щелочном растворе , на мВ положительнее по1енциала необработанного цинка, т. е. электрохимическа  обработка в молибдатном растворе в большей степени снижаег элект юхимическую активность цинкового покрыти , через 24 часа испытаний разнида между потенциалами пасеивироваппого и оксидироБанпого цинка составл ет 33- 55 мВ. Изобретение может быть проиллюстрировано несколькими примерами, 1;)едставленными в таблице. Как видно из таблицы, изобретение позвол ет значительно повысить коррозионную стойкость HOBepXHOCTil ИС сравнению с известными способа.пг К)о.ме того, из(к )ретеиие нозв(;л ет использовать операцию пacclIвиp(Jвaни  li едином технологическом процессе нанесени  цинкового покрьгги . Ф о р м у .1 а и 3 о б р е т е и и   Способ пассивировани  цииковой по1 ерхности , включающий обработку в в(;лном )аство)е )емен1 ым током нромын ленной частоты при плотности тока 30 А/дм2 и температуре 35-60°(, от л п ч а ю nui и с   тем, что, с целью новышении 1хОрр(;зионной с гийкости. Г1ассив11)ойание ведут в водном растворе. содержап1е , ()л ибдат а м м о н и   Х.юрнд аммони  11сгочники информаци|, прин тые во виимание при экспертизе . Якименко Г. Я. н др. Молибдатныс ок|1ашенные пленки на цинке и их защитные С1юйства, «Защита мета.Кюв, 1977, т. 13. .YO 1, с. 123. 2. .Лвторское свидетельстви СССР 1 639970, кл. С 25 D 11/34, 1977.comp.) and molybdate film after treatment in a 3% solution of patriotine chloride (NaCl) (immediately after passivation and after 24 hours of testing by periodically immersion in a 3% solution of NaCl). Tests show that the electrochemical activity of the zinc coating after additional processing is reduced to a degree. The potential of the piping coating, by treatment of electrochemically in molpdat solutions at 50–80 mV, is positive for the potential of the non-passivated zinc coating, and the strength of the zinc coating, treated in alkaline solution, per mV, is more positive than the potential of the raw zinc, i.e., the electrochemical treatment in molybdenum is imitated with zinc coating. After decreasing the electrochemical activity of the zinc coating, after 24 hours of testing, the difference between the potentials of the potency and the hydroxy zinc is 33-55 mV. The invention can be illustrated by several examples, 1;) shown in the table. As can be seen from the table, the invention significantly improves the corrosion resistance of the HOBepXHOCTil IP compared with the known methods. KG To) In addition, from (k) reiteration (; it is appropriate to use the operation of virusIv (In-line or a single process for applying zinc coating). Fo rum y. 1 a and 3 o n b ete e i Method of passivating the surface, including processing in (;) the current) e) with a current of the unslined frequency at a current density of 30 A / dm2 and a temperature of 35-60 ° (, from l p h a y nui and with the fact that, for the purpose of an increase of 1хОрр (; zionnaya with giosk. G1ac Siv11) is carried out in an aqueous solution containing, () l ibdat a mnon and H. Urnd ammonium 11 slugs information, taken under examination at the examination. Yakimenko G. Ya. n. molybdatnys ok | tshennye films on zinc and their protective actions, “Protection of a metaclass. Cuv, 1977, vol. 13. .YO 1, p. 123. 2.. Official certificate of the USSR, 1 639970, c. 25 D 11/34, 1977.

Claims (1)

Ф о р м у л а и з о б р е т е я и яFORMULA AND ZBRETE I and I Способ пассивирования цинковой поверхности, включающий обработку в вод35 ном растворе переменным током промышленной частоты при плотности тока > 30 А/дм2 и температуре 35—60°С, от л и чающийся тем, что, с целью повышения коррозионной стойкости, пассивирование 40 ведут в водном растворе, содержащем, г/,т:A method of passivation of a zinc surface, including processing in an aqueous solution with an alternating current of industrial frequency at a current density of> 30 A / dm 2 and a temperature of 35-60 ° C, which includes, in order to increase corrosion resistance, passivation 40 is carried out in an aqueous solution containing, g / t: Молибдат- аммония 5—8Ammonium molybdate 5-8 Хлорид аммония 20---60.Ammonium chloride 20 --- 60. 4 о4 o
SU782614006A 1978-05-04 1978-05-04 Method of zinc surface passivation SU827613A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SU782614006A SU827613A1 (en) 1978-05-04 1978-05-04 Method of zinc surface passivation

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Application Number Priority Date Filing Date Title
SU782614006A SU827613A1 (en) 1978-05-04 1978-05-04 Method of zinc surface passivation

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SU827613A1 true SU827613A1 (en) 1981-05-07

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004108407A1 (en) * 2003-06-05 2004-12-16 Metal Coatings International Inc. Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004108407A1 (en) * 2003-06-05 2004-12-16 Metal Coatings International Inc. Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals
EP1633557A1 (en) * 2003-06-05 2006-03-15 Metal Coatings International Inc. Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals
JP2006526710A (en) * 2003-06-05 2006-11-24 メタル・コーティングズ・インターナショナル・インコーポレーテッド Compositions and methods for darkening and imparting corrosion resistance to zinc or other active metals
EA008802B1 (en) * 2003-06-05 2007-08-31 Метал Коутингс Интернэшнл Инк. Compositions and methods for darkening and imparting corrosion-resistant properties to zink or other active metals
US7641743B2 (en) 2003-06-05 2010-01-05 Metal Coatings International Inc. Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals
EP1633557A4 (en) * 2003-06-05 2010-08-25 Metal Coatings Int Inc Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals
CN104532227A (en) * 2003-06-05 2015-04-22 金属涂层国际公司 Compositions and methods for darkening and imparting corrosion-resistant properties to zinc or other active metals

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