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US 2022/0267907 A1Published application
Composition, its use for acid pickling of magnesium alloys and method for acid pickling of magnesium alloys
AssigneeSafran Aircraft Engines
InventorJeremie Christian Andre COTINOT
Life of this patent
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Abstract
Composition, characterized in that: —it comprises, in a solution of demineralized water: between 10 and 80, preferably between 15 and 20, more preferably 17, g/l of a composition of phosphoric acid H3PO4, and between 2 and 15, preferably between 4 and 8, more preferably 6, g/l of a composition of potassium permanganate KMnO4, —the weight ratio H3PO4/KMnO4 is between 1.5 and 10, preferably between 1.8 and 5, mote preferably equal to 2.8, —said composition has a pH between 2.4 and 3, preferably 2.5.
Claims11
A composition, characterised in that:
- it comprises, in a solution of water:
- between 10 and 80 g/l of a composition of phosphoric acid H3PO4, and
- between 2 and 15 g/l of a composition of potassium permanganate KMnO4,
- the weight ratio H3PO4/KMnO4 is between 1.5 and 10, preferably between 1.8 and 5, most preferably equal to 2.8,
- said composition has a pH between 2.4 and 3, preferably 2.5.
2 more elements
Dependencies are inferred from the claim text.