ClassID:

120487

C23C22/50 - 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 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates Treatment of iron or alloys based thereon

Recent Application in this class:
#1
20260092376
2026-04-02

HYDROTHERMAL BLACK OXIDE CONVERSION COATING PROCESS FOR STEEL COMPONENTS

#2
20250263842
2025-08-21

AQUEOUS SURFACE TREATMENT AGENT AND SURFACE-TREATED METAL

#3
20250178734
2025-06-05

ANTIMICROBIAL SURFACE TREATMENT SYSTEMS AND METHODS FOR AIRCRAFT FAUCETS

#4
20250109452
2025-04-03

COATING LIQUID FOR FORMING INSULATION COATING FOR GRAIN-ORIENTED ELECTRICAL STEEL SHEETS, GRAIN-ORIENTED ELECTRICAL STEEL SHEET, AND METHOD FOR PRODUCING GRAIN-ORIENTED ELECTRICAL STEEL SHEET

#5
20250051929
2025-02-13

SOLUTION COMPOSITION FOR STEEL SHEET SURFACE TREATMENT, STEEL SHEET SURFACE-TREATED USING SAME, AND MANUFACTURING METHOD THEREFOR

#6
20240301560
2024-09-12

SYSTEM AND METHOD OF COATING AN AUTOMOTIVE PART WITH IRON OXIDE FOR AN ELECTRIC DRIVE UNIT OF A VEHICLE

#7
20230019472
2023-01-19

PROTECTIVE COATINGS FOR METALS

#8
20230002908
2023-01-05

ELECTRICAL STEEL SHEET WITH INSULATING COATING

#9
20220411936
2022-12-29

BEARING COMPONENT

#10
20220359888
2022-11-10

STAINLESS STEEL FOR SEPARATION PLATE OF POLYMER ELECTROLYTE MEMBRANE FUEL CELL HAVING IMPROVED HYDROPHILIC PROPERTY AND CORROSION RESISTANCE, AND MANUFACTURING METHOD THEREFOR

#11
20220194588
2022-06-23

Antimicrobial surface treatment systems and methods for aircraft faucets

#12
20220145472
2022-05-12

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

#13
20220042175
2022-02-10

STAINLESS STEEL STRUCTURE EXCELLENT IN HYDROGEN EMBRITTLEMENT RESISTANCE AND CORROSION RESISTANCE AND METHOD FOR MANUFACTURING THE SAME

#14
20220002896
2022-01-06

METHOD FOR THE SURFACE TREATMENT OF A METAL OR ALLOY PRODUCT, AND METAL OR ALLOY PRODUCT

#15
20210381072
2021-12-09

Coating liquid for forming insulation coating for grain-oriented electrical steel sheets, grain-oriented electrical steel sheet, and method for producing grain-oriented electrical steel sheet

#16
20200280075
2020-09-03

Stainless steel for separation plate of polymer electrolyte membrane fuel cell having improved hydrophilic property and corrosion resistance, and manufacturing method therefor

#17
20200263305
2020-08-20

BLACKENED ROD WITH ANTICORROSIVE COATING

#18
20200248332
2020-08-06

Production method for stainless steel sheet for fuel cell separators

#19
20200199759
2020-06-25

SLOWLY DEGRADED ALLOY AND METHOD FOR PRODUCING THE SAME

#20
20200048774
2020-02-13

ALLOY SURFACE ACTIVATION BY IMMERSION IN AQUEOUS ACID SOLUTION

#21
20200024743
2020-01-23

Acid zinc sulfate metal pretreatment

#22
20190360106
2019-11-28

Method for coating a metallic surface

#23
20190301024
2019-10-03

Process for the rapid blackening of surgical needles

#24
20190301023
2019-10-03

Reaction products of catechol compounds and functionalized co-reactant compounds for metal pretreatment applications

#25
20190292665
2019-09-26

Use of preformed reaction products of catechol compounds and functionalized co-reactant compounds to reduce oxidation of bare metal surfaces

#26
20190292402
2019-09-26

Treatment of conversion-coated metal substrates with preformed reaction products of catechol compounds and functionalized co-reactant compounds

#27
20190284700
2019-09-19

Method for corrosion-protective and cleaning pretreatment of metallic components

#28
20190153238
2019-05-23

Aqueous corrosion protection formulation based on silanes

#29
20190013525
2019-01-10

Stainless steel for polymer fuel cell separation plate having improved hydrophilicity and contact resistance and method for manufacturing same

#30
20180290434
2018-10-11

Alloy plate coated material and method of producing alloy plate coated material

#31
20180265992
2018-09-20

Coating carbon steel tubing with iron sulfide

#32
20180257339
2018-09-13

Architectural Resin Panel with Rust Layer and Methods for Making the Same

#33
20180237920
2018-08-23

Conversion coating composition comprising a dye and a method for coating a metal surface with said conversion coating composition

#34
20180198152
2018-07-12

Conducting member for fuel cells, fuel cell, fuel cell stack, and method of producing conducting member for fuel cells

#35
20180079176
2018-03-22

Electromagnetic shielding material

#36
20180068684
2018-03-08

Disk drive suspension baseplate having enhanced torque retention and method of manufacture

#37
20180066365
2018-03-08

PRE-RINSE CONTAINING A QUATERNARY AMINE FOR CONDITIONING PRIOR TO A CONVERSION TREATMENT

#38
20180057946
2018-03-01

Conversion coating and method of making

#39
20170370004
2017-12-28

Process for the rapid blackening of surgical needles

#40
20170327953
2017-11-16

Method for producing metal-plated stainless material

#41
20170226604
2017-08-10

Method for producing a retort for a nitriding furnace and retort

#42
20170204521
2017-07-20

Coated steel sheet, method for producing the same, and resin-coated steel sheet obtained using the same

#43
20170081767
2017-03-23

Alloy surface activation by immersion in aqueous acid solution

#44
20170081523
2017-03-23

Treated article and method of making the same

#45
20170040147
2017-02-09

Systems Comprising Silicon Coated Gas Supply Conduits and Methods for Applying Coatings

#46
20160369742
2016-12-22

Rubber-metal laminated gasket material

#47
20160369406
2016-12-22

Galvanized steel sheet and method for producing the same

#48
20160340786
2016-11-24

Metal plate coated stainless material and method of producing metal plate coated stainless material

#49
20160319435
2016-11-03

Multilayer coating

#50
20160263862
2016-09-15

Alloy plate coated material and method of producing alloy plate coated material

#51
20160244884
2016-08-25

Surface treatment agent for metal material and production method for surface-treated metal material

#52
20160130701
2016-05-12

Gold plate coated stainless material and method of producing gold plate coated stainless material

#53
20160083848
2016-03-24

Conversion coating composition comprising a dye and a method for coating a metal surface with said conversion coating composition

#54
20160035469
2016-02-04

Non-oriented electrical steel sheet and manufacturing method thereof

#55
20150299864
2015-10-22

METAL SURFACE TREATMENT LIQUID, SURFACE TREATMENT METHOD FOR METAL BASES, AND METAL BASE OBTAINED BY SURFACE TREATMENT METHOD FOR METAL BASES

#56
20150013566
2015-01-15

Metal material with a bismuth film attached and method for producing same, surface treatment liquid used in said method, and cationic electrodeposition coated metal material and method for producing same

#57
20140370415
2014-12-18

Stainless separator for fuel cell and method of manufacturing the same

#58
20140305903
2014-10-16

Method for manufacturing a bonded body of galvanized steel sheet and adherend

#59
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

#60
20140110034
2014-04-24

Pneumatic tire with cylindrical metal annular structure and method of manufacturing same

#61
20130105083
2013-05-02

Systems Comprising Silicon Coated Gas Supply Conduits And Methods For Applying Coatings

#62
20130084466
2013-04-04

Rheology modified pretreatment compositions and associated methods of use

#63
20130034742
2013-02-07

Zirconium pretreatment compositions containing a rare earth metal, associated methods for treating metal substrates, and related coated metal substrates

#64
20120305140
2012-12-06

Non-oriented electrical steel sheet and manufacturing method thereof

#65
20120261033
2012-10-18

Composition for metal surface treatment, metal surface treatment method and metal material

#66
20120205010
2012-08-16

CORROSION CONTROL METHOD OF METAL

#67
20120172276
2012-07-05

Acid cleaning and corrosion inhibiting compositions comprising a blend of nitric and sulfuric acid

#68
20120145282
2012-06-14

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

#69
20120097295
2012-04-26

HALOGEN-FREE TRIVALENT CHROMIUM CONVERSION COATING

#70
20120031531
2012-02-09

Hot dip galvanized steel sheet and method for manufacturing same

#71
20110309296
2011-12-22

Method for the surface treatment of stainless steel

#72
20110293951
2011-12-01

AQUEOUS SILOXANE COATING COMPOSITION, MAKING METHOD, SURFACE TREATING AGENT, SURFACE TREATED STEEL, AND COATED STEEL

#73
20110247728
2011-10-13

Halogen-free trivalent chromium conversion coating

#74
20110236677
2011-09-29

GALVANIZED STEEL SHEET AND METHOD FOR PRODUCING THE SAME

#75
20110232679
2011-09-29

Use of thioglycol ethoxylate as a corrosion inhibitor

#76
20110120497
2011-05-26

Corrosion product chemical dissolution process

#77
20110100512
2011-05-05

Quaternary ammonium salts as a conversion coating or coating enhancement

#78
20110086173
2011-04-14

Method for coating metallic surfaces with a mixture containing at least two silanes

#79
20110076505
2011-03-31

Metallic material and method of manufacturing the same

#80
20110073484
2011-03-31

METAL MATERIAL WITH A BISMUTH FILM ATTACHED AND METHOD FOR PRODUCING SAME, SURFACE TREATMENT LIQUID USED IN SAID METHOD, AND CATIONIC ELECTRODEPOSITION COATED METAL MATERIAL AND METHOD FOR PRODUCING SAME

#81
20110039115
2011-02-17

PROCESS FOR COATING METALLIC SURFACES WITH A SILANE-RICH COMPOSITION

#82
20110008644
2011-01-13

BONDED BODY OF GALVANIZED STEEL SHEET AND ADHEREND, AND MANUFACTURING METHOD THEREOF

#83
20100132844
2010-06-03

Method for the thermochemical passivation of stainless steel

#84
20100010604
2010-01-14

PASSIVATED METAL CONDUCTORS FOR USE IN CARDIAC LEADS AND METHOD OF PREPARING THE SAME

#85
20090304937
2009-12-10

Compositions and Method for Coating Metal Surfaces With an Alkoxysilane Coating

#86
20090269649
2009-10-29

Stainless separator for fuel cell and method of manufacturing the same

#87
20090242079
2009-10-01

Method for treating metal surfaces by carboxylation, use of the method for temporary protection against corrosion, and method for manufacturing a shaped metal sheet thus carboxylated

#88
20090218228
2009-09-03

Composition for metal surface treatment, metal surface treatment method and metal material

#89
20080280046
2008-11-13

Process for treating metal surfaces

#90
20080268146
2008-10-30

Hydroxyl-functional carbamoyl organosilicon compounds of low VOC and HAP generating potential, anti-corrosion and/or adhesion promoting coating composition containing same, environmentally benign method of coating metal therewith and resulting coated metal

#91
20080210343
2008-09-04

Process for treatment of metal surfaces

#92
20080160328
2008-07-03

Halogen-free trivalent chromium conversion coating

#93
20070272900
2007-11-29

Composition for Metal Surface Treatment, Treating Liquid for Surface Treatment, Method of Surface Treatment, and Surface-Treated Metal Material

#94
20070090329
2007-04-26

Storage stable composition of partial and/or complete condensate of hydrolyzable organofunctional silane

#95
20070003706
2007-01-04

Hot dip galvanized steel sheet and method for manufacturing same

#96
20060286399
2006-12-21

METAL PIECES AND ARTICLES HAVING IMPROVED CORROSION RESISTANCE

#97
20060228470
2006-10-12

No-rinse pretreatment methods and compositions

#98
20060214137
2006-09-28

Phosphonic acid and polyvinyl alcohol conversion coating

#99
20060193988
2006-08-31

Method for coating metallic surfaces with a mixture containing at least two silanes

#100
20060151071
2006-07-13

Quaternary ammonium salts as a conversion coating or coating enhancement

#101
20060147734
2006-07-06

Aqueous coating solutions and method for the treatment of a metal surface

#102
20060127681
2006-06-15

Method for coating metallic surfaces with a silane-rich composition

#103
20060099439
2006-05-11

Metal pieces and articles having improved corrosion resistance

#104
20060099429
2006-05-11

Method for coating metallic surfaces with a composition that is rich in polymers

#105
20050040138
2005-02-24

Method of surface-finishing stainless steel after descaling