公开(公告)号：DE69422377T2

公开(公告)日：2000-08-24

申请号：DE69422377

申请日：1994-11-21

Applicant: SOLLAC PUTEAUX

Inventor： SCHWENDIMANN CHRISTIAN ,  KELLER JEAN ,  AUGER JEAN-LUC ,  FATREZ PHILIPPE

IPC: C23F11/00 ,  C23C22/68 ,  C23F11/18 ,  C23G1/00

Abstract: Corrosion inhibitor for a metallic material such as steel, of the type consisting of an aqueous solution containing an alkali metal nitrite, characterised in that the said solution contains 0.01 to 0.3 mol/l of an alkali metal nitrite, 0.01 to 0.3 mol/l of an alkali metal phosphate and phosphoric acid in the proportion of a quantity sufficient to maintain the pH of the said solution, measured at ambient temperature, between 6.9 and 7.2.

公开(公告)号：DE69422377D1

公开(公告)日：2000-02-03

申请号：DE69422377

申请日：1994-11-21

Applicant: SOLLAC PUTEAUX

Inventor： SCHWENDIMANN CHRISTIAN ,  KELLER JEAN ,  AUGER JEAN-LUC ,  FATREZ PHILIPPE

IPC: C23F11/00 ,  C23C22/68 ,  C23F11/18 ,  C23G1/00

Abstract: Corrosion inhibitor for a metallic material such as steel, of the type consisting of an aqueous solution containing an alkali metal nitrite, characterised in that the said solution contains 0.01 to 0.3 mol/l of an alkali metal nitrite, 0.01 to 0.3 mol/l of an alkali metal phosphate and phosphoric acid in the proportion of a quantity sufficient to maintain the pH of the said solution, measured at ambient temperature, between 6.9 and 7.2.