EP2220175A1 - Verfahren zur verhinderung von korrosion sowie korrosion verhinderndes überzugsmaterial - Google Patents

Verfahren zur verhinderung von korrosion sowie korrosion verhinderndes überzugsmaterial

Info

Publication number
EP2220175A1
EP2220175A1 EP08852591A EP08852591A EP2220175A1 EP 2220175 A1 EP2220175 A1 EP 2220175A1 EP 08852591 A EP08852591 A EP 08852591A EP 08852591 A EP08852591 A EP 08852591A EP 2220175 A1 EP2220175 A1 EP 2220175A1
Authority
EP
European Patent Office
Prior art keywords
coating
agent
adhesive
carbon particles
coating material
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.)
Withdrawn
Application number
EP08852591A
Other languages
English (en)
French (fr)
Other versions
EP2220175A4 (de
Inventor
Juhani MÄNTYLÄ
Timo Erkolahti
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Noella Oy
Original Assignee
Noella Oy
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Noella Oy filed Critical Noella Oy
Publication of EP2220175A1 publication Critical patent/EP2220175A1/de
Publication of EP2220175A4 publication Critical patent/EP2220175A4/de
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
    • C09D5/08—Anti-corrosive paints
    • C09D5/082—Anti-corrosive paints characterised by the anti-corrosive pigment
    • C09D5/084—Inorganic compounds

Definitions

  • the object of the invention is a method and a coating material for preventing surface- related corrosion or for reducing it with the help of coating in which method the surface to be protected is coated with the help of a carbonic coating that includes an adhesive, such as shellac and a dissolvent, such as ethanol.
  • Corrosion means the same as changing of material to an unusable form due to the influence of environment.
  • the material that can get damaged becomes dissolved or otherwise reacts with the substances of the environment (air, liquid, earth etc.).
  • Corrosion resistance of several materials is totally or partly based on a protective effect of an oxide that develops due to oxidation on the surface of the material.
  • erosion corrosion the fast stream of gas or liquid on the surface of the material tends to erode the protective oxide layer away and thus tends to accelerate the corrosion.
  • composition metals such as corrosion-resisting steel, copper mixtures, titanium, which resist corrosion to a certain extent, plastics, such as polyethylene, polycarbonate coatings, such as rubber, enamelling, glazing
  • Coating provides a protection mechanism that has an insulating effect against the environment that causes corrosion.
  • Coatings provide protection against chemical, electrochemical or mechanical corrosion.
  • the known various coatings are designed for a specific purpose and they include appropriate protection mechanisms.
  • the paint can include colouring agents that prevent corrosion and change the electrochemistry of the surface such as zinc particles and the coating can simply function as an insulator between the construction material and the environment that causes corrosion.
  • most of these have significant limitations, such as adhesiveness, thermal resistance and endurance of the corroding environment in relation to the protection.
  • the coating material which is in a liquid form, is dispersed onto the surface to be protected the viscosity of which coating material is set to a suitable value with the help of a dissolvent and to which material uniform placement (dispersion) of the carbon particles is achieved by mixing the coating material with the dispersing agent before coating
  • an agent or a stream is allowed to remove the adhesive from the surface of the coating layer as a result of which carbon particles that appear on the outer surface of the coating are utilized to form a net of carbon particles on the outer surface of the coating layer, the surface tension that prevents the agent from penetrating the above mentioned net and prevents it from corroding the adhesive deeper inside the coating, of the corroding agent is utilized.
  • Characteristic for the coating material according to the invention is that the material to be dispersed comprises carbon particles, dissolvent, dispersing agent and an adhesive mixed with each other in which case it has been allowed that the adhesive can corrode and/or has been chosen to be corrosive on that outer surface of the coating material that is in contact with the agent that causes corrosion till the amount and the density of the carbon particles that emerge out of the coating material are enough to prevent the corroding agent from proceeding in the coating material.
  • the advantage of the method according to the invention is the fact that the hardened coating protects efficiently from corrosion also in very corroding conditions and at a high temperature like when it is several hundreds of degrees Celcius measured with the help of correctly chosen parameters. Protection is simple to make when the components are known and easily available. Costs are economical in relation to the benefit and it is suitable for various surfaces, objects and the coating does not require special equipment.
  • the essential components used in the invention are: carbon, a dispersing agent, an adhesive and a dissolvent. It is required of the carbon that it is as pure as possible that can have various, unorganized groups of the carbon particles, it can have organized entities of the carbon particles, such as fullerenes, carbon tubes. All previous objects can be prepared with various, known preparation methods and various types can be used as such or several types can be used simultaneously. With the help of the dispersing agent the dispersion can be formed of the adhesive and the carbon.
  • the dispersion is a mixture in which the agents are uniformly mixed with each other.
  • the dispersion is a mixture of two agents that cannot dissolve with each other in which another agent is dispersed in another agent - in the dispersion intermediate agent - as small particles.
  • dispersion dispersing agents with which the surface tension of liquid is reduced, is used.
  • the dispersing agent for example the soap, keeps the carbon particles in the mixture uniformly separated from each other.
  • the adhesive becomes attached to the material to be protected and attaches the carbon particles on the coating layer that is formed on its place.
  • the viscosity of the coating is regulated with the help of the dissolvent so that it can be dispersed while being suitably thick and uniform enough.
  • Figure 1 shows the coating layer with the surface to be protected as a profile.
  • Figure 2 shows the coating of the Figure 1 with a changed form in the environment that prevents corrosion.
  • the surface 1 is protected with the method according to the invention by spreading, spraying or in another way by placing a protective layer to it that consists of the adhesive 3, carbon particles 2, the dispersing agent and dissolvent, such as ethanol the evaporation of which away from the layer hardens the layer onto the surface 1 to be protected.
  • the carbon particles 2 are as pure as possible and their distribution has been tried to make very uniform with the help of the dispersing additive.
  • FIG 2 the same layer is shown after the fact that the corroding agent has corroded the adhesive 3 away from the outer surface of the layer.
  • the carbon particles 2 are neutral towards the most corroding agents and they will stay on their place and form a carbon particle net on the surface of the layer.
  • This kind of carbon particle net forms a barrier in order to prevent further corrosion of the adhesive 3 deeper in the layer because the corroding agent cannot penetrate the carbon particle net due to its surface tension.
  • the distance 4 of the adjacent carbon particles 2 in the method according to the invention is formed to be so small that the penetration of the corroding agent between them is prohibited and the adhesive 3 stays to form a surface for the material layer with the carbon particles 2. After that the surface is resistant against corroding liquids. Only due to corrosion, for example caused by a strong stream the carbon particles wear slowly away and the layer becomes lower.
  • Some coating material mixtures that are in a liquid form are formed in the following way:
  • Dispersing Agent Soap 1O g I g 0,4 g
  • the type of carbon was in these (Gabot) Monarch 1100 and (Evonic) Special Black 4.
  • the ethanol-amine and the 2-amino-2-methyl-l-propanol (AMP) were used as dispersing agents.
  • the following percentages can be shown as percents of weight as limits of variation for these alloying elements: carbon 1 - 70 %, adhesive 1 - 90 %, dissolvent 1 - 98 %, dispersing agent 0,2 - 20 %.
  • the preparation method of the mixture can be the following: Shellac is dissolved into the ethanol and powdery carbon is mixed with water and after that the shellac dissolution is added to the carbon mixture.
  • the dispersing agent is added as the last thing and is mixed well.
  • the dispersing agent can be added to the carbon powder while being prepared or the carbon powder is at first mixed to the dispersing agent by abrading.
  • the corroding agents have various surface tensions and as a result of that the density of the carbon particle net as the outermost part of the coating must be made denser or it can be made thinner. These variations can be achieved by increasing the amount of the carbon or by reducing the amount of carbon in relation to the other alloying elements. In this case it is important that the dispersion of the carbon particles is uniform in the layer the consequence of which is the formation of an barrier net that the corroding agent cannot penetrate.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
  • Paints Or Removers (AREA)
  • Preventing Corrosion Or Incrustation Of Metals (AREA)
EP08852591A 2007-11-21 2008-11-20 Verfahren zur verhinderung von korrosion sowie korrosion verhinderndes überzugsmaterial Withdrawn EP2220175A4 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20070886A FI20070886A0 (fi) 2007-11-21 2007-11-21 Menetelmä korroosion estämiseksi
PCT/FI2008/000128 WO2009066000A1 (en) 2007-11-21 2008-11-20 Method for preventing corrosion and covering material preventing corrosion

Publications (2)

Publication Number Publication Date
EP2220175A1 true EP2220175A1 (de) 2010-08-25
EP2220175A4 EP2220175A4 (de) 2011-05-04

Family

ID=38786669

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08852591A Withdrawn EP2220175A4 (de) 2007-11-21 2008-11-20 Verfahren zur verhinderung von korrosion sowie korrosion verhinderndes überzugsmaterial

Country Status (3)

Country Link
EP (1) EP2220175A4 (de)
FI (1) FI20070886A0 (de)
WO (1) WO2009066000A1 (de)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011118720A1 (de) * 2011-11-16 2013-05-16 Admedes Schuessler Gmbh Ethanollöslicher, elektrisch leitender Kleber
CN104819741B (zh) * 2015-04-24 2018-03-16 闫连山 一种基于单边带调制探测光的相干布里渊光时域分析传感系统

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7601425B2 (en) * 2003-03-07 2009-10-13 The Curators Of The University Of Missouri Corrosion resistant coatings containing carbon
JP2005007622A (ja) * 2003-06-17 2005-01-13 Takenaka Seisakusho:Kk 機能性被膜が形成された被覆物及び機能性被覆剤並びに機能性被覆剤の製造方法
US20050137291A1 (en) * 2003-12-17 2005-06-23 Schneider John R. Coating compositions with enhanced corrosion resistance and appearance
JP4536031B2 (ja) * 2006-04-27 2010-09-01 株式会社竹中製作所 被覆組成物および被覆物

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
No further relevant documents disclosed *
See also references of WO2009066000A1 *

Also Published As

Publication number Publication date
FI20070886A0 (fi) 2007-11-21
WO2009066000A1 (en) 2009-05-28
EP2220175A4 (de) 2011-05-04

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