C23C22/48 - CPC Classification Index

ClassID:

120486 ⎘

C23C22/48 - 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

Sub-classes:

C23C22/50 » Treatment of iron or alloys based thereon 102
C23C22/52 » Treatment of copper or alloys based thereon 53
C23C22/53 » Treatment of zinc or alloys based thereon 145
C23C22/54 » Treatment of refractory metals or alloys based thereon 9
C23C22/56 » Treatment of aluminium or alloys based thereon 105
C23C22/57 » Treatment of magnesium or alloys based thereon 41
C23C22/58 » Treatment of other metallic material 31

Recent Application in this class:

20260022468

2026-01-22

CONVERSION COATING SOLUTIONS AND METHODS OF USE THEREFOR

20260018407

2026-01-15

METHODS FOR TUNABLE DIELECTRIC THICKNESS OF A SEMICONDUCTOR SUBSTRATE USING BACK SURFACE HEATING

20250304881

2025-10-02

NEUTRALIZING INSTRUMENT REPROCESSING

20250003077

2025-01-02

AQUEOUS SURFACE TREATMENT AGENT AND SURFACE-TREATED METAL

20230138311

2023-05-04

HEAT EXCHANGER AND METHOD THEREOF PROCESSING THE SAME

20220403528

2022-12-22

COATED METAL ALLOY SUBSTRATE AND PROCESS FOR PRODUCTION THEREOF

20220372626

2022-11-24

RUST-PROOFING TREATMENT METHOD, AND RUST-PROOFING-TREATED ARTICLE

20220364018

2022-11-17

NEUTRALIZING INSTRUMENT REPROCESSING

20220267910

2022-08-25

Method for constructing micro-nano porous organic acid pretreatment layer on metal surface and its application

#10

20220259062

2022-08-18

Tin Oxide Forming Composition

#11

20210363644

2021-11-25

Super-hydrophobic manganese dioxide coating on metallic material surfaces

#12

20210317583

2021-10-14

Metal pretreatment compositions containing phenalkamine compounds

#13

20210130961

2021-05-06

High-design sliding member

#14

20210102076

2021-04-08

Film-forming treatment liquid

#15

20200399750

2020-12-24

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

#16

20190284701

2019-09-19

Pre-treatment composition before etching SiGe and method of fabricating semiconductor device using the same

#17

20190153238

2019-05-23

Aqueous corrosion protection formulation based on silanes

#18

20190112714

2019-04-18

Conversion-coated metal plate for non-condensed thermoplastic resin bonding, surface-treated metal plate for non-condensed thermoplastic resin bonding, composite member, and method for producing conversion-coated metal plate for non-condensed thermoplastic resin bonding

#19

20190010610

2019-01-10

Fluoride-free zirconium-based metal pre-treatment for passivation

#20

20180291232

2018-10-11

Surface-treated metal sheet and organic resin-covered surface-treated metal sheet

#21

20180057946

2018-03-01

Conversion coating and method of making

#22

20180029013

2018-02-01

Multifunctional cerium-based nanomaterials and methods for producing the same

#23

20160153107

2016-06-02

Multi-layered coating film formation method

#24

20160152838

2016-06-02

Metal pretreatment with acidic aqueous compositions comprising silanes

#25

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

#26

20150090369

2015-04-02

Corrosion prevention of magnesium surfaces via surface conversion treatments using ionic liquids

#27

20140371059

2014-12-18

Multifunctional cerium-based nanomaterials and methods for producing the same

#28

20130248052

2013-09-26

Binding agent, surface treatment methods using the binding agent and article manufactured by the same

#29

20130244026

2013-09-19

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

#30

20130122701

2013-05-16

Passivation composition and process

#31

20120261033

2012-10-18

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

#32

20120145282

2012-06-14

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

#33

20120121661

2012-05-17

Devices with multiple surface functionality

#34

20120114935

2012-05-10

DEVICES WITH MULTIPLE SURFACE FUNCTIONALITY

#35

20110086173

2011-04-14

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

#36

20110070429

2011-03-24

Corrosion-resistant coating for active metals

#37

20110039115

2011-02-17

PROCESS FOR COATING METALLIC SURFACES WITH A SILANE-RICH COMPOSITION

#38

20100133113

2010-06-03

Chromium(VI)-free black passivation of surfaces containing zinc

#39

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

#40