公开(公告)号：US20220267907A1

公开(公告)日：2022-08-25

申请号：US17626298

申请日：2020-07-07

申请人： SAFRAN AIRCRAFT ENGINES

发明人： Jeremie Christian Andre COTINOT

IPC分类号： C23C22/18 ,  C23C22/73 ,  C23F1/22 ,  C23G1/12

摘要： 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.