EP0006017A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Method of anti-corrosion treatment
Assignee: Individual
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Filing: 1979-05-31
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Granted: —
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Expires: 1999-05-31
Abstract
Abstract A cleaning and anti-corrosion treatment for articles such as engineering parts and particularly for motor vehicles includes the following steps:- (a) placing the vehicle in a chamber; (b) closing the chamber; (c) supplying a cleaning liquid containing a fat emulsifier to the chamber under pressure for a predetermined time; (d) washing the vehicle with water; (e) supplying a rust-removing and anti-corrosive liquid to the chamber under pressure for a predetermined time, and (f) drying the vehicle as necessary and removing it from the chamber. The anti-corrosive liquid used may be water-based and have the following composition per 100 ml of water:- Citric acid (anhydrous) 3 to 52 grammes Fat emulsifier 0.001 to 4 grammes Corrosion inhibitor 0.001 to 3 grammes.
Inventors
- 👤 Emil Andreas Bratland
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-04 08:54
CPC Classifications
C; C23; C23F; C23F11/00; B; B60; B60S; B60S3/00; C23G; C23G1/00; C23G3/00
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
79 words
A cleaning and anti-corrosion treatment method for a ferrous article which comprises the following steps: (a) placing the article in a chamber; (b) closing the chamber; (c) supplying a cleaning liquid containing a fat emulsifier to the chamber under pressure for a predetermined time; (d) washing the article with water; (e) supplying a rust-removing and anti-corrosion liquid to the chamber under pressure for a predetermined time, and (f) drying the article if necessary and removing it from the chamber.
Claim 2
Dependent Claim
79 words
A cleaning and anti-corrosion treatment method for a ferrous article which comprises the following steps: (a) placing the article in a chamber; (b) closing the chamber; (c) supplying a cleaning liquid containing a fat emulsifier to the chamber under pressure for a predetermined time; (d) washing the article with water; (e) supplying a rust-removing and anti-corrosion liquid to the chamber under pressure for a predetermined time, and (f) drying the article if necessary and removing it from the chamber.
Claim 3
Dependent Claim
34 words
A method according to claim 1 in which hollow constructional, parts of the article are bored so as to allow ingress of liquid to their interior before the supply of cleaning liquid is effected.
Claim 4
Dependent Claim
37 words
A method according to claim 1 or 2 in which the anti-corrosion liquid employed is water-based and includes the following essential ingredients: an aliphatic hydroxycarboxylic acid for example citric acid, a fat emulsifier and a corrosion inhibitor.
Claim 5
Dependent Claim
23 words
A method according to claim 3 in which the liquid employed is water based and includes the following ingredients per 100 ml. :-
Claim 6
Independent Claim
38 words
A method according to any preceding claim in which steps (c) and (d) are repeated one or more times before step (e) is carried out, and in which a water-rinsing step is interposed between steps (e) and (f).
Claim 7
Independent Claim
36 words
A method according to any preceding claim in which step (e) is carried out at a pressure in the range 0.15 to 0.5 atmospheres above atmospheric pressure, and at a temperature of from 20 to 85°C.
Claim 8
Dependent Claim
81 words
Apparatus for the cleaning and anti-corrosion treatment of metal articles including a chamber, means for making the chamber substantially pressure-tight, a platform within the chamber, a sump beneath the platform, spray nozzles within the chamber for directing liquid onto or into the or each article, a filter located in an exit pipe for the sump, and control means for controlling the supply of liquid to the nozzles whereby the article can be treated in succession with a plurality of different liquids.
Claim 9
Dependent Claim
81 words
Apparatus for the cleaning and anti-corrosion treatment of metal articles including a chamber, means for making the chamber substantially pressure-tight, a platform within the chamber, a sump beneath the platform, spray nozzles within the chamber for directing liquid onto or into the or each article, a filter located in an exit pipe for the sump, and control means for controlling the supply of liquid to the nozzles whereby the article can be treated in succession with a plurality of different liquids.
Claim 10
Dependent Claim
53 words
Apparatus according to claim 7 in combination with a system for supplying liquid under a pressure to the spray nozzles, the system including a plurality of tanks whose outlets are controlled by respective valves, and a plurality of valve-pump devices arranged downstream of the sump to return spent liquid to the relevant tank.
Claim 11
Dependent Claim
66 words
Apparatus according to claim 7 or 8 including, in addition to the spray nozzles, a plurality of hoses terminating in nozzles which can be fitted to hollow parts of the article in order to feed treatment liquid thereinto, the hose nozzles being connected to be fed with treatment liquid from a first pump separate from a second pump which is connected to feed the spray nozzles.
Claim 12
Dependent Claim
43 words
Apparatus according to claim 7 or 8 which includes a pump for feeding liquid to the spray nozzles, the arrangement being such that the pressure within the chamber can be brought to a value of from 0.15 to 1.0 atmospheres above atmospheric pressure.
Claim 13
Dependent Claim
43 words
Apparatus according to any of claims 7 to 10 and for treating vehicles including a ramp leading up to the platform and having a gap therein to accommodate a door for the chamber whereby the latter may be rendered closed and substantially pressure-tight.
References Cited (Backward Citations)
No citation records indexed.
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