JPS56119781A - Automatic concentration controlling device for aluminum surface treating liquid containing hydrofluoric acid - Google Patents
Automatic concentration controlling device for aluminum surface treating liquid containing hydrofluoric acidInfo
- Publication number
- JPS56119781A JPS56119781A JP2440180A JP2440180A JPS56119781A JP S56119781 A JPS56119781 A JP S56119781A JP 2440180 A JP2440180 A JP 2440180A JP 2440180 A JP2440180 A JP 2440180A JP S56119781 A JPS56119781 A JP S56119781A
- Authority
- JP
- Japan
- Prior art keywords
- concn
- liquid
- measured
- treating liquid
- pump
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000007788 liquid Substances 0.000 title abstract 8
- KRHYYFGTRYWZRS-UHFFFAOYSA-N Fluorane Chemical compound F KRHYYFGTRYWZRS-UHFFFAOYSA-N 0.000 title abstract 4
- 229910052782 aluminium Inorganic materials 0.000 title abstract 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 title 1
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract 4
- 150000002500 ions Chemical class 0.000 abstract 4
- 229910000838 Al alloy Inorganic materials 0.000 abstract 2
- 239000003795 chemical substances by application Substances 0.000 abstract 2
- 229910045601 alloy Inorganic materials 0.000 abstract 1
- 239000000956 alloy Substances 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 238000004381 surface treatment Methods 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/73—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals characterised by the process
- C23C22/77—Controlling or regulating of the coating process
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
Abstract
PURPOSE:To uniformly finish the surface quality of the metal to be treated by controlling the concn. of the treating liquid contg. a small amount of HF used for the surface treatment of Al and Al alloys to a prescribed range with the measured value of the F ion concn., pH or conductivity of the liquid. CONSTITUTION:The treating liquid consisting of an aqueous soln. using sulfuric acid as a principal agent and a small amount of hydrofluoric acid as an accelerator is put into a treating liquid tank 1, and Al, Al alloy materials to be treated are immersed into this, whereby they are surface- treated. At this time, the pH of the liquid is measured with a pH detector 2 immersed in the liquid, and the concn. of free F ions is measured with an F ion concn. detector 3. The measured electrode potential 4 of the former is converted to a low impedance by a pH converting amplifier 6 and a pump 16 is operated via a pump operating part 14 by the signal 12 thereof, whereby the sulfuric acid which is the principal agent is replenished at a proper rate. The measured potential 5 of the latter goes through an F ion cocn. converting amplifier 7 then through a controller 11, and a pump 17 is operated in a pump opeating part 15, whereby HF is replenished into the treating tank 1. In this way, the concn. of the treating liquid is maintained always constant; therefore the treatment condition of the surfaces of the Al etc. is maintained always uniform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2440180A JPS56119781A (en) | 1980-02-27 | 1980-02-27 | Automatic concentration controlling device for aluminum surface treating liquid containing hydrofluoric acid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2440180A JPS56119781A (en) | 1980-02-27 | 1980-02-27 | Automatic concentration controlling device for aluminum surface treating liquid containing hydrofluoric acid |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56119781A true JPS56119781A (en) | 1981-09-19 |
| JPH0331791B2 JPH0331791B2 (en) | 1991-05-08 |
Family
ID=12137135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2440180A Granted JPS56119781A (en) | 1980-02-27 | 1980-02-27 | Automatic concentration controlling device for aluminum surface treating liquid containing hydrofluoric acid |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS56119781A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50101092A (en) * | 1973-12-06 | 1975-08-11 | ||
| JPS5230937A (en) * | 1975-04-03 | 1977-03-09 | Sharp Corp | High-frequency heating apparatus |
| JPS5357141A (en) * | 1976-11-04 | 1978-05-24 | Dipsol Chem | Automatic controlling means for chromating solution and method thereof |
-
1980
- 1980-02-27 JP JP2440180A patent/JPS56119781A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50101092A (en) * | 1973-12-06 | 1975-08-11 | ||
| JPS5230937A (en) * | 1975-04-03 | 1977-03-09 | Sharp Corp | High-frequency heating apparatus |
| JPS5357141A (en) * | 1976-11-04 | 1978-05-24 | Dipsol Chem | Automatic controlling means for chromating solution and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0331791B2 (en) | 1991-05-08 |
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