PL108876B2 - Method of sealing paint coat of apparatus working in sea water - Google Patents
Method of sealing paint coat of apparatus working in sea water Download PDFInfo
- Publication number
- PL108876B2 PL108876B2 PL20665278A PL20665278A PL108876B2 PL 108876 B2 PL108876 B2 PL 108876B2 PL 20665278 A PL20665278 A PL 20665278A PL 20665278 A PL20665278 A PL 20665278A PL 108876 B2 PL108876 B2 PL 108876B2
- Authority
- PL
- Poland
- Prior art keywords
- sea water
- anode
- paint coating
- sealing
- cathode
- Prior art date
Links
- 239000003973 paint Substances 0.000 title claims description 14
- 239000013535 sea water Substances 0.000 title claims description 9
- 238000000034 method Methods 0.000 title claims description 8
- 238000007789 sealing Methods 0.000 title claims description 7
- 238000000576 coating method Methods 0.000 claims description 15
- 239000011248 coating agent Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 5
- 238000005868 electrolysis reaction Methods 0.000 claims description 4
- 229910001316 Ag alloy Inorganic materials 0.000 claims description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 3
- 239000004020 conductor Substances 0.000 claims description 3
- LWUVWAREOOAHDW-UHFFFAOYSA-N lead silver Chemical compound [Ag].[Pb] LWUVWAREOOAHDW-UHFFFAOYSA-N 0.000 claims description 3
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 150000003839 salts Chemical class 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 241001125840 Coryphaenidae Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 238000004210 cathodic protection Methods 0.000 description 1
- ZOMNIUBKTOKEHS-UHFFFAOYSA-L dimercury dichloride Chemical class Cl[Hg][Hg]Cl ZOMNIUBKTOKEHS-UHFFFAOYSA-L 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 description 1
- 229910001862 magnesium hydroxide Inorganic materials 0.000 description 1
- 239000000347 magnesium hydroxide Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Landscapes
- Prevention Of Electric Corrosion (AREA)
Description
Przedmiotem wynalazku jest sposób uszczelniania powloki malarskiej urzadzen pracujacych w wodzie morskiej.Znane sposoby uszczelniania powloki malarskiej polegaja na powtórnym malowaniu miejsc, w których wystepuja nieszczelnosci. Taki sposób uszczelniania powloki malarskiej jest mozliwy w przypadkach gdy przedmiot nie jest zanurzony w wodzie, a nieszczelnosc zostala stwierdzona lub wykryta w czasie badan tej powloki.Sposób wedlug wynalazku polega na tym, ze prowadzi sie elektrolize wody morskiej stosujac jako katode przedmiot z uszkodzona powloka malarska, a jako anode dowolny material przewodzacy, przy czym potencjal miedzy anoda, a katoda utrzymuje sie od:- 1000 do -1100 mV. Sole wapnia, magnezu i inne rozpuszczone w wodzie morskiej osadzaja sie na powierzchni konstrukcji w miejscach uszkodzen powloki malarskiej. Takie uszczelnienie podnosi przeciwkorozyjny efekt ochrony powloki malarskiej w calosci jako ochrony typu biernego.W celu wydzielenia wyzej wymienionych soli stosuje sie uklad polaryzacji katodowej z automatyczna regulacja potencjalu polegajacy na tym, ze ujemny biegun zródla pradu stalego laczy sie z konstrukcja podwodna o uszkodzonej powloce malarskiej, a do bieguna dodatniego tego zródla laczy sie anode polaryzujaca wykonana z tworzywa o,malej rozpuszczalnosci w wodzie morskiej przy przeplywie przez nie pradu stalego.W ukladzie pracuje takze obwód pomiarowo-regulacyjny zadanego potencjalu.W celu uszczelnienia powloki malarskiej na metalowych morskich konstrukcjach podwodnych (dalby, podwodne czesci kadlubów doków, kadlubów okretowych, znaków nawigacyjnych i innych konstrukcji malowanych przed montazem ich na miejsce pracy stosuje sie stacje ochrony katodowej np. typu A5, laozac zacisk minusowy z konstrukcja z powloka malarska przeznaczona do uszczelniania, a zacisk plusowy z anoda polaryzujaca wykonana np. ze stopu olowiowo-srebrowego z 2% dodatkiem srebra.2 108 N/6 Potencjal, przy którym efekt wydzielania osadów soli zwody morskiej jest najbardziej efektywny wynosi:— 1000 do —1100 mV wzgledem nasyconej elektrody kalomelowej, lub wedlug wskazan miernika stacji typu A5 (pracujacej na elektrodzie cynkowej) okolo 400 mV. W takim ukladzie pracy czas wydzielania osadów soli waha sie w granicach okolo 28 godzin. Czas ten ulega znacznemu wydluzeniu przy potencjalach powyzej -1000 mV, a przy potencjale ponizej -1100 mV wystepuje niekorzystne zjawisko wydzielania na katodzie wodoru in statu nascendi, co prowadzi do uzyskiwania powlok zlozonych glównie z,wodorotfenku magnezu i majacych porowata strukture.Zastrzezenia patentowe Sposób, uszczelniania powloki malarskiej urzadzen pracujacych w wodzie morskiej, znamienny tym, ze prowadzi elektrolize wody morskiej stosujac jako katode przedmiot z uszkodzona powloka malarska, a jako anode dowolny material przewodzacy, przy czym potencjal miedzy anoda, a katoda utrzymuje sie od -1000 do-1100 mV. 2. Sposób wedlug zastrz. 1,znamienny t y m, ze jako anode stosuje sie material o malej rozpuszczalnosci w czasie elektrolizy, korzystnie stop olowiowo-srebrowy o 2-procentowej zawartosci srebra.Prac. Poligraf. UP PRL naklad 120+18 Cena 45 zl PLThe subject of the invention is a method of sealing the paint coating of devices operating in sea water. The known methods of sealing the paint coating consist in repainting the places where there are leaks. This method of sealing the paint coating is possible in cases where the object is not immersed in water, and the leakage has been found or detected during the tests of this coating. The method according to the invention consists in electrolysis of sea water using as a cathode an object with damaged paint coating. , and as anode any conductive material, the potential between the anode and cathode is kept from - 1000 to -1100 mV. Calcium, magnesium and other salts dissolved in sea water deposit on the surface of the structure where the paint coating is damaged. Such a seal increases the anticorrosive protection effect of the paint coating in its entirety as a passive type protection. In order to separate the above-mentioned salts, a cathodic polarization system with automatic potential regulation is used, whereby the negative pole of the DC source connects with the underwater structure with damaged paint coating, and the positive pole of this source is connected to a polarizing anode made of a material with low solubility in sea water when a direct current flows through it. The system also has a measuring and regulation circuit of a given potential. In order to seal the paint coating on metal marine underwater structures (dolphins) , underwater parts of hulls, docks, ship hulls, navigation signs and other structures painted before their assembly to the workplace, cathodic protection stations, e.g. A5 type, are used, negative clamp with a structure with a paint coating intended for sealing, and a positive clamp with an anode p olizing made, for example, of a lead-silver alloy with a 2% addition of silver.2 108 N / 6 The potential for which the salt sedimentation effect is most effective is: - 1000 to - 1100 mV with respect to a saturated calomel electrode, or as indicated by a meter A5 type station (working on a zinc electrode) about 400 mV. In such a system of work, the time of separating salt deposits varies around 28 hours. This time is significantly extended at potentials above -1000 mV, and at a potential below -1100 mV there is an unfavorable phenomenon of hydrogen emission in the nascendi cathode, which leads to the production of coatings mainly composed of magnesium hydroxide and having a porous structure. sealing the paint coating of devices operating in sea water, characterized by the fact that it conducts the electrolysis of sea water using an object with a damaged paint coating as a cathode, and any conductive material as an anode, the potential between the anode and cathode remains from -1000 to -1100 mV . 2. The method according to claim A material according to claim 1, wherein the anode is a material with low electrolysis solubility, preferably a lead-silver alloy with 2% silver content. Typographer. UP PRL, circulation 120 + 18 Price PLN 45 PL
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL20665278A PL108876B2 (en) | 1978-05-05 | 1978-05-05 | Method of sealing paint coat of apparatus working in sea water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL20665278A PL108876B2 (en) | 1978-05-05 | 1978-05-05 | Method of sealing paint coat of apparatus working in sea water |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| PL206652A1 PL206652A1 (en) | 1979-03-12 |
| PL108876B2 true PL108876B2 (en) | 1980-05-31 |
Family
ID=19989134
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PL20665278A PL108876B2 (en) | 1978-05-05 | 1978-05-05 | Method of sealing paint coat of apparatus working in sea water |
Country Status (1)
| Country | Link |
|---|---|
| PL (1) | PL108876B2 (en) |
-
1978
- 1978-05-05 PL PL20665278A patent/PL108876B2/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| PL206652A1 (en) | 1979-03-12 |
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