ES321103A1 - Procedure for the treatment of surfaces in facilities containing water and water vapor. (Machine-translation by Google Translate, not legally binding)
- Google Patents
Procedure for the treatment of surfaces in facilities containing water and water vapor. (Machine-translation by Google Translate, not legally binding)
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.)
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Borg Holding AG
Bayer AG
Original Assignee
Borg Holding AG
Bayer AG
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Application filed by Borg Holding AG, Bayer AGfiledCriticalBorg Holding AG
Priority to ES0321103ApriorityCriticalpatent/ES321103A1/en
Publication of ES321103A1publicationCriticalpatent/ES321103A1/en
Cleaning And De-Greasing Of Metallic Materials By Chemical Methods
(AREA)
Abstract
Procedure for the treatment of surfaces in installations containing water and water vapor, composed essentially of iron and steel, by pickling with organic acids and further treatment with oxidizing and/or reducing materials, characterized in that the installation is cleaned with inorganic acids, which with iron form soluble complexes in the pickling solution, at pH values between about 2 and about 9 and at temperatures between about 50 and about 200º C; at pH values above 6, preferably between 6.5 or 7.5 and at temperatures of 20 to 100º C, preferably at 40 to 60º C the iron (II) formed in the previous step in iron (III) is transformed with oxidizing media and the formation of the protective layer on the surfaces of the installation is promoted to pH values between 6-10, preferably 7-8 and at temperatures of 20 to 100º, with hydrazine in the presence of reaction accelerators used as accelerator of the blue reaction of methylene and/or heavy metal complex cyanides. (Machine-translation by Google Translate, not legally binding)
ES0321103A1965-12-231965-12-23Procedure for the treatment of surfaces in facilities containing water and water vapor. (Machine-translation by Google Translate, not legally binding)
ExpiredES321103A1
(en)
Procedure for the hardening of surfaces in two stages, of workpieces made with tempered steel and steel alloys (Machine-translation by Google Translate, not legally binding)
Improvements in the procedure for the obtaining of anti-friction metal-steel composite band used in the manufacture of bearings (Machine-translation by Google Translate, not legally binding)