C23C22/36 - CPC Classification Index

ClassID:

120471 ⎘

C23C22/36 - 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 fluorides or complex fluorides containing also phosphates

Sub-classes:

C23C22/361 » {containing titanium, zirconium or hafnium compounds} 84
C23C22/362 » {containing also zinc cations} 23
C23C22/364 » {containing also manganese cations} 26
C23C22/367 » {containing alkaline earth metal cations} 6
C23C22/368 » {containing magnesium cations} 11

Recent Application in this class:

20250109500

2025-04-03

SURFACE-TREATED STEEL SHEET

20240327969

2024-10-03

SURFACE-TREATED STEEL

20220145473

2022-05-12

Surface-treated metal material

20220002562

2022-01-06

Metal surface treatment

20200399765

2020-12-24

Sn-plated steel sheet and method for manufacturing Sn-plated steel sheet

20170159185

2017-06-08

Chemical treatment steel sheet, and method for producing chemical treatment steel sheet

20170107625

2017-04-20

Plated steel sheet

20160289841

2016-10-06

Method of manufacturing a steel sheet for containers

20160153107

2016-06-02

Multi-layered coating film formation method

#10

20160040297

2016-02-11

Chemical conversion coated plated steel sheet and method for producing same

#11

20150292103

2015-10-15

Method for forming multi-layered coating film

#12

20150292073

2015-10-15

Method for producing hot-dip Zn alloy-plated steel sheet

#13

20150259776

2015-09-17

Method for producing hot-dip Zn alloy-plated steel sheet

#14

20150225856

2015-08-13

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

#15

20140251503

2014-09-11

High temperature conversion coating on steel and iron substrates

#16

20130209829

2013-08-15

Steel sheet for containers

#17

20130209827

2013-08-15

Steel sheet for containers and manufacturing method for same

#18

20130160898

2013-06-27

Chemical conversion coated plated steel sheet and method for producing same

#19

20120052312

2012-03-01

Preparation method of hot dip galvanized sheet anti-corrosive treatment agent of environmental protective

#20

20110120595

2011-05-26

METHOD FOR FORMING CONVERSION COATING ON OUTER SURFACE OF MAGNESIUM OR MAGNESIUM ALLOY

#21

20100239773

2010-09-23

Aqueous treating solution for Sn-based plated steel sheet excellent in corrosion resistance and paint adhesion, and production method of surface-treated steel sheet

#22