Development of surface treatment for aluminum and its alloys by preferential devolvement of Intermetallic phase
| Project/Area Number |
15560615
|
|---|
| Research Category |
Grant-in-Aid for Scientific Research (C)
|
| Allocation Type | Single-year Grants |
|---|
| Section | 一般 |
|---|
| Research Field |
Material processing/treatments
|
|---|
| Research Institution | Muroran Institute of Technology |
|---|
Principal Investigator |
SERI Osami Muroran Institute of Technology, Mechanical system, Professor, 工学部, 教授 (60179356)
|
|---|
| Co-Investigator(Kenkyū-buntansha) |
SAKAI Masahiro Muroran Institute of Technology, Mechanical system, Assistant, 工学部, 助手 (20301963)
|
|---|
| Project Period (FY) |
2003 – 2004
|
| Project Status |
Completed (Fiscal Year 2004)
|
| Budget Amount *help |
¥3,700,000 (Direct Cost: ¥3,700,000)
Fiscal Year 2004: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 2003: ¥3,000,000 (Direct Cost: ¥3,000,000)
|
|---|
| Keywords | aluminum / Intermetallic phase / preferential removement / pretreatment / corrosion resistance / surface treatment / elecrochemical / iron / 超音波 |
|---|
| Research Abstract |
The corrosion characteristics of aluminum power cable on which the intermetallic phase were successfully removed by the cathodic treatment in a 20% nitric acid solution at current density of -2kA/m^2 were examined in a 1.0kmol/m^3 NaCl solution. It was found that the FeAl_3 free surface of aluminum power cable by the treatment showed corrosion behavior of high purity aluminum. Electrochemical measurements revealed that the FeAl_3 free surface coated by the anodizing finishing treatment exhibits excellent oxide film performance. We have shown that the Al-Fe-Si intermetallic compound particles exposed on 1100 aluminum wrought alloy (industrially pure aluminum alloy) are preferentially and selectively removed by two steps : the first step is selective dissolution of aluminum component in the Al-Fe-Si intermetallic compound by electrochemical reaction. The second step is intensive removal of the iron-enriched intermetallic particles on which vigorous hydrogen bubbling has been took place, which is accelerated by application of ultrasonic vibration. It is found that the intermetallic compound-free surface obtained by the proposed technique is preferable for the surface treatment such as Ni-P electroless plating.
|
Report
(3 results)
Research Products
(4 results)
