DD202111A5 - PROCESS FOR CORROSION PREVENTION OF ROOF WATER TREATMENT SYSTEMS - Google Patents

Abstract

The invention relates to a method for Korrosionsverhuetung to Dachentwaesserungssystemen, such as rainwater pipes, pipe bend or the like. It is used to prevent corrosion of the inside of sheets of copper, aluminum, galvanized steel, zinc, in particular with copper and titanium, alloyed, rolled strip, durable and 180 ° C fracture-free foldable zinc, molded u. mechanically internally rainwater downpipes, pipe bends o. The like. Roof drainage systems in Verbindungg. applied with bituminous materials through a protective layer. The goal is to d. Cost f. to save costly repairs and maintenance on Dachentwaesserungssystemen and increase the life of the Dachentwaesserungssysteme significantly. The object is to provide a method that allows for rainfall pipes, pipe bend or the like a permanent protective layer of the inside. As a solution it is suggested that d. Downpipes, pipe bend or the like are coated immediately after loosening in the Loetwaerme with an acid-resistant protective lacquer.

Description

) Ό Ό Berlin, 10. 08. 1982

- 1. - JtP B 05 C / 239 359/6

60 55.9 / 24 Ii

Process for preventing corrosion of roof drainage stones

Field of application of the invention

The invention relates to a method for Korrosicnsverhütung on roof drainage systems, such as Regenfallrolireri., Pipe bend or the like.

It is used to prevent corrosion of the inside of sheets of copper, aluminum, galvanized steel, zinc, in particular of copper and titanium, alloyed, "rolled strip, durable and 180 ° fallow-fold zinc, molded and mechanically soldered inside rainwater pipes, pipe bend or the like of Roof drainage systems used in conjunction with bituminous building materials through a protective layer.

Characteristic of the known technical solutions

In construction products made from zinc or zinc alloys, the surface atmosphere initially forms a layer of zinc hydroxide which, upon reaction with the carbon dioxide in the air, converts to a dense, adherent and water-insoluble topcoat of basic zinc carbonate. This protective coating is responsible for the high corrosion resistance of zinc, but the natural protective coating of basic zinc carbonate does not require additional protective coating under normal environmental conditions, but it must be avoided that bitumen comes in contact with the zinc for over 40 years is that bitumen on

* - 2 -

AP B 05 C / 239 359/6 ^β0 559/24 Ii

Can cause corrosion. The bitumen corrosion is caused by degradation products of the bitumen, which in the weathering primarily by the influence of UY = - -; Radiation forms · These strong-acid decomposition products are water-soluble and, with a small flow of water, such as dew and lever, form high acid concentrations, which generally attack the metals.

Bituminous corrosion is normally avoided if the roofing work is carried out properly in accordance with the rules and regulations of the roofing trade VOB-DBI 18 338. The most common deficiencies are lack of surface protection, such as graveling or splitting as a radiating surface, uneven roofing membranes (puddling) and flat roofs (= 3 °), which means that the precipitation can not occur *

Insofar as bituminous building materials irregularly remain without effective radiation layer, all metal parts must be 'pore-free' protected from the water management level with a color or bitumen coating. These paintings have the disadvantage that they are care coatings that need to be renewed at specific intervals, with a renewal usually only in metal parts, such as angle strips, eaves, - ^ inside, which are in the Wasserfpirungsebene takes place. The protective coating in downpipes, pipe bends, or the like can not be renewed in general because of the difficult accessibility.

Object of the invention

The aim of the invention is to save the cost of complex repair and maintenance work on roof drainage systems and to increase the life of the roof drainage systems significantly.

- 3 - AP B. 05 C / 239 359/6

60 559/24 II

Presentation of the WeS eILS ₁

The object of the invention is to provide a method for preventing corrosion in roof drainage systems, in which the inside 'of sheet metal of copper, aluminum, galvanized steel or' ZiIiIC ₅ in particular of copper and titanium alloyed, "bandgeweststem, daueretandfestem and 180 fracture-free foldable zinc, machine soldered down rainwater pipes, pipe bend or the like of roof drainage systems is provided with a permanent protective layer.

According to the invention the object is achieved in that the rainwater pipes, - pipe bend or the like are coated immediately after soldering in the soldering heat with an acid-resistant protective coating.

Expediently, the layer thickness of the lacquer layer is 60 to 120 μm.

Since the downpipes, pipe bend or the like immediately after ejection from the soldering machine still have a temperature of 50 to 12O ⁰ C, the applied to the inside of the lacquer cures very quickly, a quasi Einbrenneffekt is achieved, the lacquer layer a special strength against Gives wear. "

The paint protection layer is applied by high-pressure spraying by means of an inserted into the downpipe, pipe bend, or the like spray bar, at the front end there is a nozzle with radial outlet openings The paint is sprayed in concentrated i'orm and therefore has a better Haftvemögen. Due to the minimal use of solvents, the paint particles are denser after drying.

2 3 9 3 59 Ό - 4 - AP S 05 C / 239 359/6

60 559/24 II

If a thicker varnish splint is applied, there is no risk of running or lacquering of the varnish. Since the varnish covers perfectly in only one pass, it is possible to dispense with the multiple insertion of the syringe.

Compared with conventional application of protective coatings, this method can be used with higher viscosities.

From fo hr limitation n b e i play

The invention will be explained in more detail below using an exemplary embodiment.

In the accompanying drawing show:

1 shows a top view of the device for carrying out the method according to the invention;

2 shows a side view of the device for carrying out the method according to the invention.

The from the soldering device 1, as described for example in DE-PS 26 07 970, ejected downpipe 2 is launched by the removal device 3 on the continuously running cross conveyor 4, from the head station 5 via the slide rails 6 on the lifting table 7 of __ Test station 8 rolls. After lifting the lifting table 7, the two openings of the downpipe are automatically closed by the stopper 9 and the tightness of the soldered seam checked. About the lift / lowered mounted slides 10 rolls a temperature of about 90 ⁰ C having rainfall pipe 2 on the table 11, where the spray bar 12 retracted into the downpipe 2 and a paint layer of about

- 5 -, AP B 05 C / 239 359 / β

-. , 60 559/24 II

βθ jom thickness is applied. Dia thereby forming .backne'bel be sucked on the hood 13. Thereafter, the coated downpipe 2 is placed on the packing table 14.

Claims (4)

β - AP B 05 C / 239 359/6 60 559 / 24- Ii Termination claim 1. A method for preventing corrosion of roof drainage systems, wherein the inside of sheet metal of copper, aluminum, galvanized steel or zinc, in particular from copper and titanium alloyed, bandgewalztemj durable and 180 ° 0 fracture-free foldable zinc existing, mechanically soldered down rainwater pipes, pipe bend or characterized in that the downpipes, pipe bend or the like are coated immediately after soldering in the solder heat with an acid-resistant protective lacquer. 2. The method according to item 1, characterized in that the. Lacquer layer is sprayed in a thickness of 60 to 120 » 3 · Method according to points 1 and 2, characterized in that the paint protective layer is applied by high-pressure spraying. 4. The method according to item 3, characterized in that the Hochdruckspritζen by means of an inserted into the downpipe, pipe bend or the like spray bar. For this 2 sheets of drawings