Abrégé

This surface treatment method comprises a rustproofing step, a rinsing step, and a cleaning step. In the rustproofing step, a rustproofing liquid containing orthophosphoric acid and an organic acid is used to perform a rustproofing treatment on the surface of a steel material. In the rinsing step, a treatment liquid containing an oxo acid salt of a transition metal is used to perform a rinsing treatment on the surface of the steel material. In the cleaning step, the surface of the steel material that has undergone the rinsing step is subjected to a cleaning treatment.

Classes IPC  ?

• C23C 22/08 - Orthophosphates
• C23C 22/83 - Post-traitement chimique
• C23C 8/42 - Traitement par un seul élément
• C23C 22/47 - Traitement chimique de surface de matériaux métalliques par réaction de la surface avec un milieu réactif laissant des produits de réaction du matériau de la surface dans le revêtement, p. ex. revêtement par conversion, passivation des métaux au moyen de solutions aqueuses au moyen de solutions aqueuses acides d'un pH < 6 contenant des oxalates et des phosphates
• C23C 8/80 - Post-traitement
• C23C 22/82 - Post-traitement

Abrégé

This surface treatment method comprises a rust proofing step, a rinsing step and a cleaning step. In the rust proofing step, a rust proofing treatment is carried out on the surface of a steel material using a rust proofing liquid that contains orthophosphoric acid and an organic acid. In the rinsing step, a rinsing treatment is carried out on the surface of the steel material using a treatment liquid containing an oxo acid salt of a transition metal. In the cleaning step, a cleaning treatment is carried out on the surface of the steel material after the rinsing step.

Classes IPC  ?

• C23C 22/17 - Orthophosphates contenant des cations du zinc et des acides organiques
• C23C 22/83 - Post-traitement chimique