C23C22/17 - CPC Classification Index

ClassID:

120455 ⎘

C23C22/17 - 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 zinc cations containing also organic acids

Recent Application in this class:

20250059647

2025-02-20

Surface Adjuster for Zinc Phosphate Chemical Conversion Treatment

20240300013

2024-09-12

Surface treatment method of metal powder and surface passivated metal powder

20230175138

2023-06-08

RESOURCE-SAVING METHOD FOR ZINC PHOSPHATING OF A METAL SURFACE

20220049359

2022-02-17

Treatment agent for chromium-free insulating coating formation, insulation-coated grain-oriented electrical steel sheet, and method for manufacturing the same

20190330743

2019-10-31

Method of tin-plating copper alloy for electric or electronic parts and automobile parts and tin-plating material of copper alloy manufactured therefrom

20190127860

2019-05-02

Two-step sealing of anodized aluminum coatings

20170341107

2017-11-30

Electrical steel sheet

20170335464

2017-11-23

Electrical steel sheet

20170314137

2017-11-02

PROCESS FOR COATING METALLIC SURFACES WITH A PASSIVATING AGENT, THE PASSIVATING AGENT AND ITS USE

#10

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

#11

20140017514

2014-01-16

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

#12

20130115470

2013-05-09

PREPARATION FOR PASSIVATING METALLIC SURFACES, COMPRISING ACID-FUNCTIONAL POLYMERS AND TI OR ZR COMPOUNDS

#13

20130035498

2013-02-07

Semiconductor that has a functionalized surface

#14

20120091398

2012-04-19

Anti-corrosive treatment for surfaces made of zinc and zinc alloys

#15

20120052312

2012-03-01

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

#16

20110008645

2011-01-13

PROCESS FOR COATING METALLIC SURFACES WITH A PASSIVATING AGENT, THE PASSIVATING AGENT AND ITS USE

#17

20100203237

2010-08-12

CORROSION PROTECTIVE AND ELECTRICAL CONDUCTIVITY COMPOSITION FREE OF INORGANIC SOLID PARTICLES AND PROCESS FOR THE SURFACE TREATMENT OF METALLIC SHEET

#18

20090324839

2009-12-31

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

#19

20090178734

2009-07-16

Processing solution for forming hexavalent chromium free, black conversion film on zinc or zinc alloy plating layers, and method for forming hexavalent chromium free, black conversion film on zinc or zinc alloy plating layers

#20

20090071573

2009-03-19

PHOSPHATING SOLUTION WITH HYDROGEN PEROXIDE AND CHELATING CARBOXYLIC ACIDS

#21

20090032146

2009-02-05

Aqueous reaction solution and method of passivating workpieces having zinc or zinc alloy surfaces and use of a heteroaromatic compound

#22

20080210341

2008-09-04

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

#23

20080166575

2008-07-10

Method For Preparing Metallic Workplaces For Cold Forming

#24

20070298246

2007-12-27

Corrosion-inhibiting coating for metal substrates and corrosion-resistant article

#25

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

#26

20050109426

2005-05-26