EP0347420A1 - Verfahren zur herstellung einer korrosionsfesten beschichtung - Google Patents
Verfahren zur herstellung einer korrosionsfesten beschichtungInfo
- Publication number
- EP0347420A1 EP0347420A1 EP88902363A EP88902363A EP0347420A1 EP 0347420 A1 EP0347420 A1 EP 0347420A1 EP 88902363 A EP88902363 A EP 88902363A EP 88902363 A EP88902363 A EP 88902363A EP 0347420 A1 EP0347420 A1 EP 0347420A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- metal surface
- cerium
- acidic solution
- method defined
- metal
- 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.)
- Withdrawn
Links
- 238000000576 coating method Methods 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000011248 coating agent Substances 0.000 title claims abstract description 17
- 230000007797 corrosion Effects 0.000 title description 40
- 238000005260 corrosion Methods 0.000 title description 40
- 229910052751 metal Inorganic materials 0.000 claims abstract description 44
- 239000002184 metal Substances 0.000 claims abstract description 44
- 239000003929 acidic solution Substances 0.000 claims abstract description 38
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 29
- -1 cerium cations Chemical class 0.000 claims abstract description 18
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 claims abstract description 15
- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 26
- VYLVYHXQOHJDJL-UHFFFAOYSA-K cerium trichloride Chemical compound Cl[Ce](Cl)Cl VYLVYHXQOHJDJL-UHFFFAOYSA-K 0.000 claims description 16
- 238000007654 immersion Methods 0.000 claims description 12
- 229910052725 zinc Inorganic materials 0.000 claims description 8
- 239000011701 zinc Substances 0.000 claims description 8
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims description 6
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 6
- 239000004411 aluminium Substances 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 3
- 229910052749 magnesium Inorganic materials 0.000 claims description 3
- 239000011777 magnesium Substances 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 229910052793 cadmium Inorganic materials 0.000 claims description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 239000000243 solution Substances 0.000 abstract description 8
- 238000001556 precipitation Methods 0.000 abstract description 4
- 239000002253 acid Substances 0.000 abstract description 2
- 230000001590 oxidative effect Effects 0.000 abstract 1
- 238000012360 testing method Methods 0.000 description 19
- 229910001008 7075 aluminium alloy Inorganic materials 0.000 description 16
- 229910004664 Cerium(III) chloride Inorganic materials 0.000 description 14
- 239000003973 paint Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000011282 treatment Methods 0.000 description 7
- 229910000838 Al alloy Inorganic materials 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 4
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical class [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 4
- 239000003112 inhibitor Substances 0.000 description 4
- 230000005764 inhibitory process Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- POAOYUHQDCAZBD-UHFFFAOYSA-N 2-butoxyethanol Chemical compound CCCCOCCO POAOYUHQDCAZBD-UHFFFAOYSA-N 0.000 description 2
- 150000000703 Cerium Chemical class 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 2
- WQZGKKKJIJFFOK-GASJEMHNSA-N Glucose Natural products OC[C@H]1OC(O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-GASJEMHNSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 2
- 238000007792 addition Methods 0.000 description 2
- WQZGKKKJIJFFOK-VFUOTHLCSA-N beta-D-glucose Chemical compound OC[C@H]1O[C@@H](O)[C@H](O)[C@@H](O)[C@@H]1O WQZGKKKJIJFFOK-VFUOTHLCSA-N 0.000 description 2
- 238000010349 cathodic reaction Methods 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 229910052761 rare earth metal Inorganic materials 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 229910001122 Mischmetal Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 230000002378 acidificating effect Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- PYPNFSVOZBISQN-LNTINUHCSA-K cerium acetylacetonate Chemical compound [Ce+3].C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O.C\C([O-])=C\C(C)=O PYPNFSVOZBISQN-LNTINUHCSA-K 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- MAYPHUUCLRDEAZ-UHFFFAOYSA-N chlorine peroxide Chemical compound ClOOCl MAYPHUUCLRDEAZ-UHFFFAOYSA-N 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007739 conversion coating Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000008121 dextrose Substances 0.000 description 1
- 239000008103 glucose Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 235000021317 phosphate Nutrition 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000001376 precipitating effect Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910021653 sulphate ion Inorganic materials 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 150000003751 zinc Chemical class 0.000 description 1
- UGZADUVQMDAIAO-UHFFFAOYSA-L zinc hydroxide Chemical compound [OH-].[OH-].[Zn+2] UGZADUVQMDAIAO-UHFFFAOYSA-L 0.000 description 1
- 229940007718 zinc hydroxide Drugs 0.000 description 1
- 229910021511 zinc hydroxide Inorganic materials 0.000 description 1
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 1
- 229910000165 zinc phosphate Inorganic materials 0.000 description 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
- C23C22/05—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 using aqueous solutions
- C23C22/06—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 using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—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 using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
-
- 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
- C23C22/05—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 using aqueous solutions
- C23C22/06—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 using aqueous solutions using aqueous acidic solutions with pH less than 6
- C23C22/48—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 using aqueous solutions using aqueous acidic solutions with pH less than 6 not containing phosphates, hexavalent chromium compounds, fluorides or complex fluorides, molybdates, tungstates, vanadates or oxalates
- C23C22/53—Treatment of zinc or alloys based thereon
Definitions
- the present invention relates to a method of forming coatings on metal surfaces " to inhibit corrosio .
- Corrosion is an electrochemical process . generally consisting of two or more partial reactions.
- cathodic sites which may be copper or iron rich micro-constituents, . cathodic reactions such as the reduction of oxygen (O2 + 2H 2 0 + 4e ⁇ 0H ) and the evolution of hydrogen 2H + 2e ⁇ H 2 occur- Inhibition of corrosion can be achieved if any of these reactions can be stopped or the rates at which they proceed reduced.
- chromates have been the accepted inhibitors of corrosion of aluminium alloys in aqueous environments .
- chromates are employed in paint films and sealants . Chromates are classified as anodic inhibitors because they prevent metal dissolution by forming a stable passive film on the metal surface.
- Zinc salts have also been used to inhibit corrosion. Inhibition by zinc cations results from the deposition of insoluble zinc hydroxide at cathodic sites promoting reduced rates of cathodic reaction. Thus, zinc is classified as a cathodic inhibitor. In practice, it is frequently used as zinc phosphate.
- the corrosion resistance was attributed to the formation of a complex hydrated cerium oxide film on the aluminium alloy.
- the research suggested that the cerium oxide film, if applied as a coating to 7075 aluminium alloy, could offer protection against corrosion in chloride containing environments .
- a method of forming a coating containing cerium on the surface of a metal comprising:
- the method comprises the use of hydrogen peroxide as the oxidising agent.
- the preferred method comprises:
- the metal is any one of aluminium, steel, zinc, cadmium and magnesium.
- cerium salt is cerium chloride.
- the pH of the acidic solution is less than 3.0 prior to contact with the metal surface.
- the pH of the acid solution is above 3.0 in the region -of the metal surface after contact with the metal surface.
- the quality of the coating is dependent on a number of factors such as the concentration of cerium cations in the acidic solution and the contact time of the acidic solution with the metal surface. It is preferred that the concentration of the cerium cations is between 5000 and 15000 parts per million (ppm) and the contact time is less than 60 minutes. It is particularly preferred that the concentration of the cerium cations is 10000 ppm and the contact time is 7 minutes.
- test specimens were prepared by forming coatings on samples of 7075 aluminium alloy plate (Al, 5.6% Zn, 2.5% Mg, 1.6% Cu, 0.3% Cr) .
- Each test specimen was formed by mixing together cerous chloride and hydrogen peroxide to form an aqueous acidic solution and then immersing samples of 7075 aluminium alloy plate in the acidic solution to form a coating thereon.
- the effect of the following variables on corrosion rate of the test specimens was investigated:
- the graph in Figure 1 illustrates the effect of the concentration of cerous chloride in the acidic solution on the corrosion rate of a series of test ' specimens prepared under the following conditions: ( a ) pH : 2 . 7 ;
- the graph indicates that only a small concentration of cerous chloride in the acidic solution was required to form corrosion-resistant coatings on the samples of 7075 aluminium alloy plate. Specifically, a
- the graph in figure 1 also confirms the effectiveness of the use of cerium to form corrosion-resistant coatings. Specifically, the graph indicates that corrosion rates of only 4.2 ⁇ g/m 2 /sec were recorded with test specimens prepared in acidic solutions containing between 5000 and 20,000 ppm cerous chloride (cf corrosion rate of 7 ⁇ g/m /sec for untreated samples of 7075 aluminium alloy plate).
- the graph in Figure 2 illustrates the effect of the concentration of hydrogen peroxide in the acidic solution on the corrosion rate of a series of test specimens prepared under the following conditions:
- the graph indicates that the concentration of hydrogen peroxide in the acidic solution had a significant effect on the corrosion-resistant characteristics of the coatings formed on the samples of 7075 aluminium alloy plate. This is reflected by the fact that a relatively high corrosion rate of 5.5 ⁇ g/m /s&c was recorded with a test specimen prepared in an acidic solution containing 1% hydrogen peroxide,
- the graph in figure 3 illustrates the effect of the pH of the acidic solution on the corrosion rate of a series of test specimens prepared under the following conditions . :
- the graph indicates that the pH of the acidic solution had a significant effect on the corrosion-resistant characteristics of coatings formed on the samples of 7075 aluminium alloy plate.
- the profile of the graph in Figure 3 indicates an optimum range of values of pH centred on 2.5. It is thought that the progressive increase in corrosion rate as the pH decreased from 2.5 was due to the pH being increasingly too low for the subsequent increase in- pH following contact with the samples of 7075 aluminium alloy plate to reach a threshold pH at which cerium precipitates. Moreover, whilst not clearly shown in the graph, it is expected that the corrosion rate would progressively increase as the pH increased from 2.5, and it is thought this trend would be due to cerium precipitating in the bulk of the acidic solution rate than as a coating on the samples of 7075 aluminium alloy plate.
- the graphs in Figures 4 and 5 respectively illustrate the effect of immersion time and immersion temperature on the corrosion rate of a series of test specimens prepared under the set conditions for the pH of the acidic solution and concentrations of H 2 0 2 and CeCl3 (7H2O) described above.
- the graph in Figure 4 indicates that an. immersion time of only 3 minutes was necessary to form a corrosion-resistant coating on a sample of 7075 aluminium alloy plate, and the graph in Figure 5 indicates that the temperature of the acidic solution did not affect significantly the corrosion-resistant characteristics of the coatings formed on the samples of 7075 aluminium alloy plate.
- a series of experiments was carried out to investigate the adhesion of an epoxy primer/polyurethane paint film to coatings formed from cerium.
- the experiments comprised forming a paint film on the test specimens and then gluing a block having an upstanding shaft onto the paint film. The block was then rotated about the axis of the shaft while the plate was held stationary. The torque at failure was determined to provide a measure of the adhesion strength of the paint film to the coatings .
- test specimens similar to those described in the foregoing were prepared.
- the only change in the procedure for preparing the test specimens was the addition of brighteners to the acidic solution.
- the brighteners included pearl glue, dextrose, glucose and starch. It was found that there was a further lowering of the corrosion rates of the test specimens.
- test specimens were prepared by forming coatings on zinc plate rather than 7075 aluminium plate. It was found that the rate of corrosion of the test specimens was up to 8 times less than the rate of corrosion of untreated zinc plate.
- the acidic solution thus formed has a pH approximately 2, and when the metal contacts the solution the surface layers of the metal are attacked and hydrogen is evolved. The evolution of. hydrogen results in an increase in the pH at the metal surface.
- the above preferred method of forming a cerium cation coating has a number of advantages over the known methods.
- One of the advantages is that the method is not dependent on applying a cathodic potential to form a coating in a reasonable time.
- Another advantage is that the method results in coatings that are uniform, have good corrosion properties and paint film adhesion properties.
- cerous chloride as the source of cerium cations
- cerous sulphate as the source of cerium cations
- mischmetall chloride as the source of cerium sulphate
- cerous perehlorate cerium acetyl acetonate
- cerous nitrate cerous nitrate
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)
- Catalysts (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
- Chemically Coating (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPI064987 | 1987-03-03 | ||
| AU649/87 | 1987-03-03 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0347420A1 true EP0347420A1 (de) | 1989-12-27 |
| EP0347420A4 EP0347420A4 (de) | 1990-02-26 |
Family
ID=3772048
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19880902363 Withdrawn EP0347420A4 (de) | 1987-03-03 | 1988-03-03 | Verfahren zur herstellung einer korrosionsfesten beschichtung. |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0347420A4 (de) |
| JP (1) | JPH02502655A (de) |
| CA (1) | CA1292155C (de) |
| NZ (1) | NZ223740A (de) |
| WO (1) | WO1988006639A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110670054A (zh) * | 2019-10-11 | 2020-01-10 | 青海民族大学 | 一种镁合金表面铈酸盐转化修复膜及其制备方法 |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5194138A (en) * | 1990-07-20 | 1993-03-16 | The University Of Southern California | Method for creating a corrosion-resistant aluminum surface |
| US5192374A (en) * | 1991-09-27 | 1993-03-09 | Hughes Aircraft Company | Chromium-free method and composition to protect aluminum |
| US5362335A (en) * | 1993-03-25 | 1994-11-08 | General Motors Corporation | Rare earth coating process for aluminum alloys |
| EP0719350B1 (de) * | 1993-09-13 | 2002-01-09 | Commonwealth Scientific And Industrial Research Organisation | Metallbehandlung mit saurer, seltene erden ionen enthaltenden reinigungslösungen |
| AUPM621194A0 (en) * | 1994-06-10 | 1994-07-07 | Commonwealth Scientific And Industrial Research Organisation | Conversion coating and process for its formation |
| US6068711A (en) * | 1994-10-07 | 2000-05-30 | Mcmaster University | Method of increasing corrosion resistance of metals and alloys by treatment with rare earth elements |
| GB9420295D0 (en) * | 1994-10-07 | 1994-11-23 | Lu Yucheng | Method of increasing corrosion resistance of steels by treatment with cerium |
| ATE213285T1 (de) * | 1994-11-11 | 2002-02-15 | Commw Scient Ind Res Org | Verfahren und lösung zur gewährleistung eines konversionsüberzugs auf einer metalloberfläche |
| AU716052B2 (en) * | 1996-02-05 | 2000-02-17 | Nippon Steel Corporation | Corrosion resistant surface treated metal material and surface treatment agent therefor |
| US6190780B1 (en) | 1996-02-05 | 2001-02-20 | Nippon Steel Corporation | Surface treated metal material and surface treating agent |
| US6248184B1 (en) | 1997-05-12 | 2001-06-19 | The Boeing Company | Use of rare earth metal salt solutions for sealing or anodized aluminum for corosion protection and paint adhesion |
| US5932083A (en) * | 1997-09-12 | 1999-08-03 | The Curators Of The University Of Missouri | Electrodeposition of cerium-based coatings for corrosion protection of aluminum alloys |
| AUPQ633200A0 (en) | 2000-03-20 | 2000-04-15 | Commonwealth Scientific And Industrial Research Organisation | Process and solution for providing a conversion coating on a metallic surface I |
| AUPQ633300A0 (en) * | 2000-03-20 | 2000-04-15 | Commonwealth Scientific And Industrial Research Organisation | Process and solution for providing a conversion coating on a metallic surface ii |
| WO2002014586A1 (en) | 2000-08-17 | 2002-02-21 | The Curators Of The University Of Missouri | Additive-assisted, cerium-based, corrosion-resistant e-coating |
| US7294211B2 (en) | 2002-01-04 | 2007-11-13 | University Of Dayton | Non-toxic corrosion-protection conversion coats based on cobalt |
| US6818116B2 (en) | 2002-08-08 | 2004-11-16 | The Curators Of The University Of Missouri | Additive-assisted cerium-based electrolytic coating process for corrosion protection of aluminum alloys |
| US7048807B2 (en) | 2002-08-08 | 2006-05-23 | The Curators Of The University Of Missouri | Cerium-based spontaneous coating process for corrosion protection of aluminum alloys |
| ES2211348B1 (es) * | 2002-12-27 | 2005-10-01 | Universidad De Cadiz | Procedimiento para la obtencion de capas de conversion libres de cromatos sobre aleaciones de aluminio. |
| US7601425B2 (en) | 2003-03-07 | 2009-10-13 | The Curators Of The University Of Missouri | Corrosion resistant coatings containing carbon |
| US7452427B2 (en) | 2004-12-01 | 2008-11-18 | Deft, Inc. | Corrosion resistant conversion coatings |
| US10041176B2 (en) | 2005-04-07 | 2018-08-07 | Momentive Performance Materials Inc. | No-rinse pretreatment methods and compositions |
| RU2296185C1 (ru) * | 2005-09-16 | 2007-03-27 | Государственное образовательное учреждение высшего профессионального образования "Удмуртский государственный университет" | Способ упрочнения изделий |
| JP5733980B2 (ja) * | 2008-09-17 | 2015-06-10 | 株式会社放電精密加工研究所 | 亜鉛又は亜鉛合金表面を有する金属部材の黒色化成皮膜形成方法及び黒色化防錆皮膜形成方法 |
| US9347134B2 (en) | 2010-06-04 | 2016-05-24 | Prc-Desoto International, Inc. | Corrosion resistant metallate compositions |
| TWI477648B (zh) * | 2010-12-30 | 2015-03-21 | Hon Hai Prec Ind Co Ltd | 鋁及鋁合金表面防腐處理方法及其製品 |
| US10876211B2 (en) | 2011-09-16 | 2020-12-29 | Prc-Desoto International, Inc. | Compositions for application to a metal substrate |
| EP2915903B1 (de) | 2014-03-05 | 2018-02-21 | The Boeing Company | Chromfreie Umwandlungsbeschichtung |
| KR20190039998A (ko) * | 2016-08-12 | 2019-04-16 | 피피지 인더스트리즈 오하이오 인코포레이티드 | 전처리 조성물 |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE863280C (de) * | 1951-07-02 | 1953-01-15 | American Chem Paint Co | Verfahren und Mittel zur Erhoehung der Korrosionsfestigkeit von Metalloberflaechen |
| DE2319673C2 (de) * | 1972-05-11 | 1982-03-18 | The Lummus Co., 07003 Bloomfield, N.J. | Verfahren zur Beschichtung von Stahloberflächen |
| GB2023453B (en) * | 1977-11-01 | 1982-11-17 | Atomic Energy Authority Uk | Coating of substrates |
| US4328285A (en) * | 1980-07-21 | 1982-05-04 | General Electric Company | Method of coating a superalloy substrate, coating compositions, and composites obtained therefrom |
| CA1228000A (en) * | 1981-04-16 | 1987-10-13 | David E. Crotty | Chromium appearance passivate solution and process |
| GB8324717D0 (en) * | 1983-09-15 | 1983-10-19 | British Petroleum Co Plc | Inhibiting corrosion in aqueous systems |
| GB2150158B (en) * | 1983-11-19 | 1986-11-26 | Alain James Duggan | Treatment of boiler tubes |
| JPS60200972A (ja) * | 1984-03-23 | 1985-10-11 | Hitachi Ltd | ジルコニウムまたはジルコニウム合金の防食方法 |
-
1988
- 1988-03-01 CA CA000560195A patent/CA1292155C/en not_active Expired - Lifetime
- 1988-03-03 EP EP19880902363 patent/EP0347420A4/de not_active Withdrawn
- 1988-03-03 NZ NZ22374088A patent/NZ223740A/xx unknown
- 1988-03-03 WO PCT/AU1988/000060 patent/WO1988006639A1/en not_active Ceased
- 1988-03-03 JP JP63502524A patent/JPH02502655A/ja active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110670054A (zh) * | 2019-10-11 | 2020-01-10 | 青海民族大学 | 一种镁合金表面铈酸盐转化修复膜及其制备方法 |
| CN110670054B (zh) * | 2019-10-11 | 2021-06-29 | 青海民族大学 | 一种镁合金表面铈酸盐转化修复膜及其制备方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02502655A (ja) | 1990-08-23 |
| CA1292155C (en) | 1991-11-19 |
| WO1988006639A1 (en) | 1988-09-07 |
| EP0347420A4 (de) | 1990-02-26 |
| NZ223740A (en) | 1989-06-28 |
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