ClassID:

120484

C23C22/46 - 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

Sub-classes:
Recent Application in this class:
#1
20250196254
2025-06-19

LASER-INDUCED STRUCTURES FOR BIOMEDICAL USE

#2
20240166968
2024-05-23

ONE-STEP PRETREATMENT METHOD OF METALLIC SUBSTRATES AT NON-NEUTRAL PH VALUES FOR METAL COLD FORMING

#3
20230091443
2023-03-23

ONE-STEP PRETREATMENT METHOD OF METALLIC SUBSTRATES FOR METAL COLD FORMING

#4
20220145472
2022-05-12

Coating agent for forming grain-oriented electrical steel sheet coating and method for manufacturing grain-oriented electrical steel sheet

#5
20200399750
2020-12-24

Zinc-based plated steel sheet having post-treated coating formed thereon

#6
20200283907
2020-09-10

Method for producing chemically treated alloy material, and chemical treatment solution regeneration apparatus used in method for producing chemically treated alloy material

#7
20200276610
2020-09-03

Passivation composition comprising a silane-modified silicate compound

#8
20190276924
2019-09-12

METHOD FOR INSPECTING AND PROCESSING HIGH ALLOY STEELS

#9
20190136383
2019-05-09

Trivalent chromium chemical conversion liquid for zinc or zinc alloy bases and chemical conversion coating film

#10
20180305820
2018-10-25

Method for producing a heat exchanger

#11
20170348730
2017-12-07

Passivation composition comprising a silane-modified silicate compound

#12
20170342570
2017-11-30

Products for the preventive treatment of stainless steel and related methods

#13
20170226644
2017-08-10

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

#14
20170009363
2017-01-12

Reactive-type chemical conversion treatment composition and production method of member with chemical conversion coated surface

#15
20160265116
2016-09-15

Method for preparing shaped metal bodies for cold working

#16
20160208391
2016-07-21

Treatment liquid for trivalent chromium conversion coating and treatment method of metal substrate

#17
20160208390
2016-07-21

Treatment liquid for black trivalent chromium conversion coating, trivalent chromium-containing water-soluble liquid for finishing treatment, and treatment method of metal substrate

#18
20160115579
2016-04-28

Method for inspecting and processing high hardness alloy steels

#19
20150225856
2015-08-13

Method for the manufacture of a substrate provided with a chromium VI-free and cobalt-free passivation

#20
20140370415
2014-12-18

Stainless separator for fuel cell and method of manufacturing the same

#21
20140130941
2014-05-15

Aqueous acidic composition for forming chromium-containing chemical conversion coating on iron-based member, and iron-based member having chemical conversion coating formed using the composition

#22
20130013081
2013-01-10

Nanosurface

#23
20120199787
2012-08-09

AQUEOUS SOLUTION OF CHROMIUM SALT AND METHOD FOR PRODUCING SAME

#24
20120145282
2012-06-14

Chromium-and-fluorine-free chemical conversion treatment solution for metal surfaces, metal surface treatment method, and metal surface coating method

#25
20120097295
2012-04-26

HALOGEN-FREE TRIVALENT CHROMIUM CONVERSION COATING

#26
20110297549
2011-12-08

ALUMINUM ALLOY-AND-RESIN COMPOSITE AND METHOD FOR MAKING THE SAME

#27
20110247728
2011-10-13

Halogen-free trivalent chromium conversion coating

#28
20110168299
2011-07-14

PROCESS FOR PRODUCING AN AQUEOUS SOLUTION CONTAINING A SOURCE OF CHROMIUM (III)

#29
20110159315
2011-06-30

Finishing Agent and Member Having an Overcoat Formed from the Finishing Agent

#30
20110076505
2011-03-31

Metallic material and method of manufacturing the same

#31
20110041958
2011-02-24

Chromium-free solution for treating metal surfaces

#32
20100273013
2010-10-28

Chrome-free composition of low temperature curing for treating a metal surface and a metal sheet using the same

#33
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

#34
20100203327
2010-08-12

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

#35
20100173264
2010-07-08

Nanosurface

#36
20100095867
2010-04-22

Aqueous solution of chromium salt and method for producing same

#37
20090269649
2009-10-29

Stainless separator for fuel cell and method of manufacturing the same

#38
20090020185
2009-01-22

Aqueous treating solution for forming black trivalent-chromium chemical conversion coating on zinc or zinc alloy and method of forming black trivalent-chromium chemical conversion coating

#39
20080254315
2008-10-16

Chromium-free solution for treating metal surfaces

#40
20080210341
2008-09-04

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

#41
20080160328
2008-07-03

Halogen-free trivalent chromium conversion coating

#42
20070086938
2007-04-19

Aqueous solution of chromium salt and method for producing same

#43
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

#44
20060014042
2006-01-19

Hybrid metal oxide/organometallic conversion coating for ferrous metals

#45
20050194574
2005-09-08

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

#46
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