公开(公告)号：US11873569B2

公开(公告)日：2024-01-16

申请号：US16927417

申请日：2020-07-13

Applicant: RTX CORPORATION

Inventor： Lei Chen ,  Lesia V. Protsailo ,  Michael N. Task

IPC: C25D5/12 ,  F01D5/18 ,  C25D7/00 ,  C25D5/50 ,  C23C18/50 ,  C23C18/16 ,  C23C18/32 ,  B32B15/04 ,  C22C27/06 ,  C25D3/56 ,  F01D5/28

CPC classification number: C25D5/12 ,  B32B15/04 ,  C22C27/06 ,  C23C18/165 ,  C23C18/1616 ,  C23C18/1692 ,  C23C18/32 ,  C23C18/50 ,  C25D3/56 ,  C25D5/50 ,  C25D7/008 ,  F01D5/187 ,  B32B2603/00 ,  F01D5/288 ,  F05D2230/90 ,  F05D2300/121 ,  F05D2300/132 ,  F05D2300/21 ,  F05D2300/2112 ,  F05D2300/611 ,  F05D2300/701

Abstract: Disclosed herein is a method of coating, comprising providing an article having an internal passage therein to be coated; electrolytically applying a first layer that comprises chromium or a chromium alloy onto a surface of the internal passage; electrolytically applying a second layer comprising aluminum or an aluminum alloy onto the first layer; and heat treating the article to promote interdiffusion between the first layer and the second layer.