ClassID:

120460

C23C22/20 - 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 phosphates; Orthophosphates containing aluminium cations

Recent Application in this class:
#1
20250250651
2025-08-07

ELECTRIC STEEL WITH TENSION COATING LAYER, AND METHOD OF PRODUCING THE SAME

#2
20250066922
2025-02-27

A COATING FOR GRAIN-ORIENTED SILICON STEEL COATING LAYER, AND GRAIN-ORIENTED SILICON STEEL SHEET AND MANUFACTURING METHOD THEREFOR

#3
20250059648
2025-02-20

INSULATING COATING COMPOSITION FOR ELECTRICAL STEEL SHEET, ELECTRICAL STEEL SHEET, AND METHOD FOR MANUFACTURING SAME

#4
20240035129
2024-02-01

Non-oriented electrical steel sheet and method for manufacturing same

#5
20230203316
2023-06-29

Method of forming protective coating

#6
20220341043
2022-10-27

NON-ORIENTED ELECTRICAL STEEL SHEET AND SURFACE TREATMENT AGENT FOR NON-ORIENTED ELECTRICAL STEEL SHEET

#7
20220162759
2022-05-26

Coated metal, coating-forming treatment solution, and method for producing coated metal

#8
20220112605
2022-04-14

Aqueous composition for coating grain-oriented steel

#9
20220106689
2022-04-07

Electrical steel sheet having insulating coating

#10
20220098692
2022-03-31

Grain-oriented electrical steel sheet and method for manufacturing same

#11
20210317545
2021-10-14

GRAIN-ORIENTED ELECTRICAL STEEL SHEET AND METHOD FOR REFINING MAGNETIC DOMAIN OF SAME

#12
20210287834
2021-09-16

Grain-oriented magnetic steel sheets having chromium-free insulating tension coating, and methods for producing such steel sheets

#13
20210269921
2021-09-02

Production method for treatment solution for forming insulating coating, production method for steel sheet having insulating coating, and production apparatus for treatment solution for forming insulating coating

#14
20190226093
2019-07-25

Coated metal, coating-forming treatment solution, and method for producing coated metal

#15
20190186018
2019-06-20

Grain-oriented electrical steel sheet and method for producing grain-oriented electrical steel sheet

#16
20180371621
2018-12-27

Treatment solution for chromium-free tension coating, method for forming chromium-free tension coating, and grain oriented electrical steel sheet with chromium-free tension coating

#17
20180371620
2018-12-27

Treatment solution for chromium-free tension coating, method for forming chromium-free tension coating, and grain oriented electrical steel sheet with chromium-free tension coating

#18
20180251899
2018-09-06

INSULATIVE COATING PROCESSING LIQUID AND METHOD FOR MANUFACTURING METAL HAVING INSULATIVE COATING

#19
20180155840
2018-06-07

Insulating coating for electrical steel sheet

#20
20180080127
2018-03-22

Insulating-coated oriented magnetic steel sheet and method for manufacturing same

#21
20170342568
2017-11-30

Electrical steel sheet

#22
20170341107
2017-11-30

Electrical steel sheet

#23
20170335464
2017-11-23

Electrical steel sheet

#24
20170306498
2017-10-26

ACTIVATING RINSE AND METHOD FOR TREATING A SUBSTRATE

#25
20170233871
2017-08-17

Pre-coating agent composition for grain-oriented electrical steel sheet, grain-oriented electrical steel sheet comprising same, and manufacturing method therefor

#26
20170167030
2017-06-15

Method for Producing a Sandwich Structure, Sandwich Structure Produce Thereby and Use Thereof

#27
20160322138
2016-11-03

Coating agent for electrical steel sheet, manufacturing method therefor and electrical steel sheet coating method using same

#28
20160305026
2016-10-20

Treatment solution for chromium-free tension coating, method for forming chromium-free tension coating, and grain oriented electrical steel sheet with chromium-free tension coating

#29
20160060465
2016-03-03

Chromium-free coating for the electrical insulation of grain-oriented electrical steel strip

#30
20150368158
2015-12-24

Solution for forming insulation coating and grain-oriented electrical steel sheet

#31
20140102907
2014-04-17

Tin-plated steel sheet and method for manufacturing the same

#32
20140017514
2014-01-16

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

#33
20130177709
2013-07-11

Finishing agent for chemical conversion coating and method for producing same

#34
20110180185
2011-07-28

Tinned steel sheet and method for producing the same

#35
20110168563
2011-07-14

TIN-PLATED STEEL SHEET AND METHOD FOR MANUFACTURING THE SAME

#36
20110104514
2011-05-05

METHOD FOR PRODUCING TINNED STEEL SHEET AND TINNED STEEL SHEET

#37
20110091741
2011-04-21

METHOD FOR PRODUCING TINNED STEEL SHEET, TINNED STEEL SHEET, AND CHEMICAL CONVERSION SOLUTION

#38
20110067786
2011-03-24

Treatment solution for insulation coating for grain oriented electrical steel sheet and method for producing grain oriented electrical steel sheet having insulation coating

#39
20110039114
2011-02-17

Grain-oriented electrical steel sheet and producing method therefor

#40
20110017352
2011-01-27

Continuous method for treating the surface of metal strips

#41
20100224286
2010-09-09

METHOD FOR COATING ZINC-PLATED STEEL STRIPS WITH AQUEOUS FORMULATIONS OF ACIDIC POLYMERS

#42
20100206437
2010-08-19

Treatment solution for insulation coating for grain oriented electrical steel sheet and method for producing grain oriented electrical steel sheet having insulation coating

#43
20090324839
2009-12-31

Method of passivating metallic surfaces by means of copolymers having phosphoric acid and/or phosphonic acid groups

#44
20090324837
2009-12-31

Coating solution for forming insulating film with excellent corrosion resistance property and film close adhesion property and film intensity without chrome and a method for making the insulation film on non-oriented electrical steel sheet by using it

#45
20090233114
2009-09-17

Grain-oriented electrical steel sheet having high tensile strength insulating film and method of treatment of such insulating film

#46
20090208764
2009-08-20

Grain-oriented electrical steel sheet having insulating film not containing chromium and insulating film agent of same

#47
20070012382
2007-01-18

Steel product excellent in corrosion resistance and corrosion fatigue resistance, and surface treatment method therefor

#48
20050147832
2005-07-07

Surface-treated steel sheets of good white rust resistance, and method for producing them