FR2218024A5 - Rapid determination of corrosion resistance - by subjecting metal surfaces opt. provided with protective coatings to action of atomic oxygen and opt. aggressive anions - Google Patents
Rapid determination of corrosion resistance - by subjecting metal surfaces opt. provided with protective coatings to action of atomic oxygen and opt. aggressive anionsInfo
- Publication number
- FR2218024A5 FR2218024A5 FR7332894A FR7332894A FR2218024A5 FR 2218024 A5 FR2218024 A5 FR 2218024A5 FR 7332894 A FR7332894 A FR 7332894A FR 7332894 A FR7332894 A FR 7332894A FR 2218024 A5 FR2218024 A5 FR 2218024A5
- Authority
- FR
- France
- Prior art keywords
- opt
- foil
- corrosion
- action
- aggressive anions
- 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.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N17/00—Investigating resistance of materials to the weather, to corrosion, or to light
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental & Geological Engineering (AREA)
- Environmental Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Investigating And Analyzing Materials By Characteristic Methods (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
Abstract
A semipermeable foil, e.g. cellophan or gelatin, is impregnated with an electrolyte yielding O2 on electrolysis and opt. contg. aggressive anions, and tightly squeezed between the object under test as an anode and an inert cathode. A p.d. sufficient to decompose water, is applied (normally 6 V). The foil in tight contact with the examined surface delays the formation of molecules from the O2 atoms, and the escape of bubles, whereby the corrosive action is much intensified; it is opt. further promoted by the presence of aggressive anions. The degree of corrosion is assessed either by direct examination of the corroded surface (pref. photoelectric) or by photoelectrically measuring the reduction of the transparency of the foil, or by chemically examining the corrosion prods., e.g. with use of colour indicator. The damaging of the protective coating can be assessed by contacting the examined surface with a cellophan plate impregnated with chemicals undergoing a colour reaction with the metal substrate. Corrosion test may take a varied time but the optimum time for stainless steel and aluminium is 3 hrs.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| HUAA000723 HU166668B (en) | 1972-02-13 | 1972-02-13 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2218024A5 true FR2218024A5 (en) | 1974-09-06 |
Family
ID=10992977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7332894A Expired FR2218024A5 (en) | 1972-02-13 | 1973-09-13 | Rapid determination of corrosion resistance - by subjecting metal surfaces opt. provided with protective coatings to action of atomic oxygen and opt. aggressive anions |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE2346472C3 (en) |
| FR (1) | FR2218024A5 (en) |
| HU (1) | HU166668B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0610003A1 (en) * | 1993-02-02 | 1994-08-10 | Nalco Chemical Company | Method for determining the efficacy of a corrosion protection treatment |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111103228B (en) * | 2018-10-26 | 2021-07-16 | 宁波方太厨具有限公司 | Method for testing anti-discoloration protection effect of high-temperature-resistant coating on stainless steel surface |
| CN111103227B (en) * | 2018-10-26 | 2021-07-16 | 宁波方太厨具有限公司 | Device for testing anti-discoloration protection effect of high-temperature-resistant coating on stainless steel surface |
-
1972
- 1972-02-13 HU HUAA000723 patent/HU166668B/hu unknown
-
1973
- 1973-09-13 FR FR7332894A patent/FR2218024A5/en not_active Expired
- 1973-09-14 DE DE19732346472 patent/DE2346472C3/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0610003A1 (en) * | 1993-02-02 | 1994-08-10 | Nalco Chemical Company | Method for determining the efficacy of a corrosion protection treatment |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2346472A1 (en) | 1974-08-29 |
| HU166668B (en) | 1975-05-28 |
| DE2346472C3 (en) | 1975-12-18 |
| DE2346472B2 (en) | 1975-05-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |