US4244989A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of cleaning and rust-protecting a metal surface
Assignee: Akzo NV
•
Filing: 1978-04-07
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Granted: 1981-01-13
•
Expires: 1998-04-07
Abstract
Abstract An abrasive particle and method are provided for cleaning and rust-proofing steel prior to painting by subjecting the steel to abrasion with abrasive particles coated with a binder such as a synthetic resin which is compatible with the paint to be applied, and a corrosion resistant salt which has a solubility of not more than 20 grams per liter in water at 20 DEG C. The corrosion resistant composition is deposited on the steel surface as it is abraded.
Inventors
- 👤 Arie Noomen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:44
CPC Classifications
C; C23; C23F; C23F11/00; C23F11/08; C23F11/10; C23F11/16; C23F11/163; C23F11/14; C23F11/147
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
67 words
A method of cleaning a corrodible metal surface and depositing a layer of corrosion resistant salt thereon prior to painting which comprises abrading the surface with abrasive particles having a coating of a corrosion-resistant salt bonded thereto with a binder which is compatible with the paint to be applied, said salt having a solubility in water at 20° C. of not more than 20 grams per liter.
Claim 2
Independent Claim
67 words
A method of cleaning a corrodible metal surface and depositing a layer of corrosion resistant salt thereon prior to painting which comprises abrading the surface with abrasive particles having a coating of a corrosion-resistant salt bonded thereto with a binder which is compatible with the paint to be applied, said salt having a solubility in water at 20° C. of not more than 20 grams per liter.
Claim 3
Dependent Claim
19 words
The method of claim 1 wherein the corrosion-resisting salt is a salt of carboxylic acid containing a nitro group.
Claim 4
Dependent Claim
18 words
The method of claim 2 wherein the carboxylic acid is a carboxylic acid containing 7 to 14 atoms.
Claim 5
Dependent Claim
22 words
The method of claim 2 wherein the corrosion resisting salt is a salt of an aromatic carboxylic acid containing a nitro group.
Claim 6
Dependent Claim
15 words
The method of claim 4 wherein the corrosion-resisting salt is a salt of 5-nitroisophthalic acid.
Claim 7
Dependent Claim
26 words
The method of claim 5 wherein the corrosion resisting salt is a zinc salt or a lead-zinc salt of a carboxylic acid containing a nitro group.
Claim 8
Dependent Claim
32 words
The method of claim 1 wherein the corrosion-resisting salt is a film-forming, alkaline complex compound of an alkaline earth metal salt of an organic sulphonic acid and a alkaline earth metal carbonate.
Claim 9
Dependent Claim
15 words
The method of claim 7 wherein the alkaline earth metal salt is a calcium salt.
Claim 10
Dependent Claim
31 words
The method of claim 8 wherein the corrosion-resisting salt is a mixture of calcium carbonate and the calcium salt of an alkylphenyl sulphonic acid whose alkyl group contains 22 carbon atoms.
Claim 11
Dependent Claim
31 words
The method of claim 1 wherein the corrosion-resisting salt is a non-metallic corrosion-resisting salt which has a solubility of not more than 20 grams per liter in water at 20° C.
Claim 12
Dependent Claim
18 words
The method of claim 1 wherein the coating of the abrasive particles also contains a corrosion-resisting metallic powder.
Claim 13
Dependent Claim
12 words
The method of claim 11 wherein the metallic powder is zinc powder.
Claim 14
Dependent Claim
27 words
An abrasive particle coated with a binder and a corrosion-resisting salt having a solubility of not more than 20 grams per liter in water at 20° C.
Claim 15
Dependent Claim
27 words
An abrasive particle coated with a binder and a corrosion-resisting salt having a solubility of not more than 20 grams per liter in water at 20° C.
References Cited (Backward Citations)
US2623835A
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US3498768A
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US3573962A
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US3696048A
Cited
US3746643A
Cited
GB1377484A
Cited
GB1426829A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-01-13 | 1984-07-14 | 1985-01-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-01-13 | 1988-07-14 | 1989-01-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-01-13 | 1992-07-14 | 1993-01-13 | $7700.00 | Window Closed / Lapsed |