HFZA, also called Fluorozirconic acid or Hexafluorozirconic acid, is mainly used as a metal and coatings industry corrosion inhibitor. 

HFZA shows the highest effectiveness on aluminum though it can also be used on other metals. 

HFZA is used in non-chromium surface passivation in the surface treatment industry.

HFZA is employed as an alternative to nickel-based products with less hazardous properties regarding environmental and health & safety related regulations.

HFZA, CAS 12021-95-3 (Hexa Fluorozirconic acid or fluozirconic acid) has the formula H2ZrF6. 

HFZA is a corrosive chemical, like all salts of fluorosilicic acid. 

HFZA is used in aluminum anodizing, surface treatment applications, electroplating, and chrome-free aluminum lacquering processes in zirconium oxide thin films.  

HFZA and Fluorotitanic acid are often used in the plating system for metal treatment.

Applications of HFZA

Electroplating

Aluminum lacquering in chrome-free processes

Synthesis of fluoride-releasing dental monomers, as a precursor of ZrO2 ceramic films as well as metal surface passivation

HFZA reduces the occurrence of sludge as a side product – e.g., in Zincphosphate-based systems.

Synonym(s): Dihydrogen hexafluorozirconate solution, Hydrogen zirconium fluoride, Fluorozirconic acid, Hexafluorozirconic acid

Linear Formula: H2ZrF6

CAS Number: 12021-95-3

Molecular Weight: 207.23

EC / List no.: 234-666-0

CAS no.: 12021-95-3

Mol. formula: F6Zr.2H

HFZA is used for the following applications: HFZA-based surface pretreatments on steel for corrosion resistance, Preparation of titania photocatalyst synthesized from the ionic-liquid-like precursor, Synthesis of fluoride-releasing dental monomer, As a precursor to ZrO2 ceramic thin films.

HFZA is an inorganic compound aqueous solution used mainly in manufacturing optical glass, and fluozirconate is a corrosion inhibitor for surface pre-treatment in the metal industry. 

HFZA is most effective on aluminum but can also be used on other metals.

HFZA is a Common corrosion inhibitor on steel and other metal surfaces.

HFZA is the replacement of phosphates for the treatment of zinc-galvanized and cold–roll steel

HFZA is used for non-chromium surface passivation, an active component in thin-film coatings.

Application of HFZA as a corrosion inhibitor in the conversion baths:

For the corrosion protection of light metals or light metal alloys, conversion baths with the corrosion inhibitor HFZA is used. 

The light metals are treated by immersing them in the HFZA bath for a given time. 

A conversion layer forms now, protecting the treated metal from corrosion.

Regulatory process names

Dihydrogen hexafluorozirconate(2-)

EC Inventory

Dihydrogen hexafluorozirconate(2-)

dihydrogen hexafluorozirconate(2-)

Pre-Registration process

Fluorozirconic acid

Zirconate(2-), hexafluoro-, dihydrogen, (OC-6-11)-

Zirconate(2-), hexafluoro-, hydrogen (1:2), (OC-6-11)-

CAS names

Zirconate(2-), hexafluoro-, hydrogen (1:2), (OC-6-11)-

IUPAC names

Dihydrogen hexafluorozirconate(2-)

dihydrogen hexafluorozirconate(2-)

Dihydrogen hexafluorozirconate(2-)

dihydrogen hexafluorozirconiumdiuide

hexafluorozirconate(2-)

Fluorozirconic acid

Hexafluorozirconic acid

Hydrogen zirconium fluoride

MFCD00082965 [MDL number]

Tetrafluorozirconium dihydro fluoride [ACD/IUPAC Name]

Tétrafluorozirconium, difluorhydrate [French] [ACD/IUPAC Name]

Tetrafluorzirconiumdihydrofluorid [German] [ACD/IUPAC Name]

Dihydrogen hexafluorozirconate

Fluorozirconic acid

HFZA

ZIRCONIUM TETRAFLUORIDE DIHYDRO FLUORIDE

OTHER PRODUCTS OF ATAMAN CHEMICALS THAT MIGHT BE OF INTEREST:

Hexafluorosilicic acid

Hexafluorotitanic acid