ClassID:

120485

C23C22/47 - CPC Classification

Classification description:

Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using aqueous solutions using aqueous acidic solutions with pH less than 6 containing oxalates containing also phosphates

Recent Application in this class:
#1
20230193472
2023-06-22

ANTICORROSION TREATMENT SOLUTION AND USES

#2
20200291527
2020-09-17

Solution composition containing trivalent chromium for surface treatment of steel sheet, galvanized steel sheet surface—treated with same, and method for manufacturing galvanized

#3
20180320101
2018-11-08

Water-based lubricating coating agent for metal material, surface-treated metal material, and method for forming lubricating coating for metal material

#4
20180155840
2018-06-07

Insulating coating for electrical steel sheet

#5
20170226644
2017-08-10

Corrosion-resistant trivalent-chromium chemical conversion coating and solution for trivalent-chromium chemical treatment

#6
20140290802
2014-10-02

Surface treatment method and coating method for steel material, and method for producing machine component

#7
20140017514
2014-01-16

Finishing agent for trivalent chromium chemical conversion coating film, and method for finishing black trivalent chromium chemical conversion coating film

#8
20130115470
2013-05-09

PREPARATION FOR PASSIVATING METALLIC SURFACES, COMPRISING ACID-FUNCTIONAL POLYMERS AND TI OR ZR COMPOUNDS

#9
20120199787
2012-08-09

AQUEOUS SOLUTION OF CHROMIUM SALT AND METHOD FOR PRODUCING SAME

#10
20100230009
2010-09-16

Processing solution for forming hexavalent chromium free and corrosion resistant conversion film on zinc or zinc alloy plating layers, hexavalent chromium free and corrosion resistant conversion film, method for forming the same

#11
20100203327
2010-08-12

Corrosion-resistant trivalent-chromium chemical conversion coating and solution for trivalent-chromium chemical treatment

#12
20100095867
2010-04-22

Aqueous solution of chromium salt and method for producing same

#13
20090309481
2009-12-17

Field emission device and method for fabricating cathode emitter and zinc oxide anode

#14
20090178734
2009-07-16

Processing solution for forming hexavalent chromium free, black conversion film on zinc or zinc alloy plating layers, and method for forming hexavalent chromium free, black conversion film on zinc or zinc alloy plating layers

#15
20090050238
2009-02-26

Treatment solution for forming of black trivalent chromium chemical coating on zinc or zinc alloy and method of forming black trivalent chromium chemical coating on zinc or zinc alloy

#16
20080210341
2008-09-04

Treatment solution for forming black hexavalent chromium-free chemical conversion coating film on zinc or zinc alloy

#17
20070086938
2007-04-19

Aqueous solution of chromium salt and method for producing same

#18
20070023104
2007-02-01

Agent for reducing conversion film overall friction coefficient for trivalent chromate treating solution, trivalent chromate treating solution and method for production thereof, and trivalent chromate conversion film reduced in overall friction coefficient and method for production thereof

#19
20060054248
2006-03-16

Colored trivalent chromate coating for zinc

#20
20050194574
2005-09-08

Aluminum elements and processes for the preparation of the same and chemical agents therefor

#21
20050109426
2005-05-26

Processing solution for forming hexavalent chromium free, black conversion film on zinc or zinc alloy plating layers, and method for forming hexavalent chromium free, black conversion film on zinc or zinc alloy plating layers

#22
20050103403
2005-05-19

Processing solution for forming hexavalent chromium free and corrosion resistant conversion film on zinc or zinc alloy plating layers, hexavalent chromium free and corrosion resistant conversion film, method for forming the same