Invention Grant
- Patent Title: Near neutral pH pickle on multi-metals
-
Application No.: US16514022Application Date: 2019-07-17
-
Publication No.: US10941496B2Publication Date: 2021-03-09
- Inventor: Chalo Aoun
- Applicant: MacDermid Enthone Inc.
- Applicant Address: US CT Waterbury
- Assignee: MacDermid Enthone Inc.
- Current Assignee: MacDermid Enthone Inc.
- Current Assignee Address: US CT Waterbury
- Agency: Carmody Torrance Sandak & Hennessey LLP
- Main IPC: C23C22/05
- IPC: C23C22/05 ; C23G1/26 ; B08B3/08 ; C23G1/00

Abstract:
A near neutral pH pickling composition for the removal of oxides from metallic surfaces, including heat treated steel. The pickling composition comprises a) a water-soluble organic or inorganic nitro compound, wherein a central N atom has an oxidation state of 3+; b) a polarizing agent for the nitro compound, wherein the polarizing agent comprises at least one of a phosphonate and a carboxylate; c) a pH buffer, and d) at least one metal complexing agent. The composition is preferably maintained at a pH between about 4.5 and about 7.5. The near neutral pH pickle composition can be used on various metallic surfaces as well as composite surfaces comprising metallic and non-metallic portions.
Information query
IPC分类: