Process for coating metallic surfaces with coating compositions containing particles of a layered double hydroxide

  1. Home
  2. Interface

Patent Details

Publication Number
WO2013156541
PT106256
AU2013251173
CA2869697
US2015079298
Priority Date
2012-04-17
Publication Date
2013-10-24
International Patent Classification
B05D3/10
B05D7/00
C09D5/08

Figures

figura
Coating a metal surface comprising pretreatment with nanocontainers and primer impregnated with nanocontainers.

Abstract

The invention relates to a process of coating a metallic surface with a composition for coating with a pretreatment composition prior to organic coating, with a passivation composition without intent for subsequent organic coating, with a pretreatment primer composition, with a primer composition, with a paint composition or with an electrocoating composition, wherein each one coating composition or the thereof generated coating contains particles on the base of at least one layered double hydroxide (LDH) phase showing the general formula [1]: [M2+ (1 +- 0.5) - x (M3+,M4+)x(OH)2+- 0.75] An- x / n s mH2O, wherein M2+, M3+ and M4+ are certain divalent, trivalent resp. tetravalent cations, wherein there is no need that cations M3+ are present or there is no need that cations M4+ are present, wherein the anions A and/or neutral or charged molecules A including assemblies with molecules A are selected from the group consisting of anions of hydroxide, fluorides, carbonates, nitrates, sulfates, chromate, chromite, molybdates, phosphomolybdates, phosphates, phosphonates, tungstates, vanadates, azoles, carboxylates, dodecylbenzenes, phenolic compounds, anionic surfactants and biomolecules, and/or wherein each one coating composition or the thereof generated coating contains their at least partially calcined and/or their partially or totally calcined and then rehydrated LDH particles primarily based on a mixture of substances selected from the group consisting of oxides, double oxides, multiple oxides, hydroxides, at least one LDH phase, further anions A and molecules A.

Innovative aspects & main advantages

This patent focus on the development of protective layers (pre-treatments, primers, paints) containing particles based on layered double hydroxides. The role of layered double hydroxides is to store and release in a controlled way active species such as corrosion inhibitors which will contribute for the improvement of the protective performance conferred by the coatings to the metallic substrates. LDHs materials can also work as nanotraps for aggressive anions and improve the barrier effect against the ingress of water and electrolytes from the surrounding environment.

Applications

These coatings can be applied in different branches of vehicle industry, from automotive to aeronautical industries.

Inventors

Ferreira, Mário; Zheludkevich, Mikhail; Tedim, João; Gandubert, Valerie; Schmidt-Hansberg, Thomas; Hack, Theo; Nixon, Sonja; Raps, Dominik; Becker, Diana; Schroeder, Sven

Our Inventors

foto João Tedim

João Tedim

Associate Professor
foto Mário Guerreiro Silva Ferreira

Mário Guerreiro Silva Ferreira

Retired Professor
foto Mikhail Zheludkevich

Mikhail Zheludkevich

Invited Principal Researcher

Applicant

Universidade de Aveiro

Groups Involved

G4 - Renewable Materials and Circular Economy

Share this Patent

Related Patents

We use cookies for marketing activities and to offer you a better experience. By clicking “Accept Cookies” you agree with our cookie policy. Read about how we use cookies by clicking "Privacy and Cookie Policy".


Privacy and Cookie Policy

Personal data

CICECO-Aveiro Institute of Materials respects your privacy, ensuring confidentiality of personal data you share with the institution through this way, not collecting any personal information about you without your consent, under the terms required by General Data Protection Regulations (RGPD).

The data collected in forms are intended exclusively for processing user requests and will not be used for any other purpose, always safeguarding their confidentiality, under the terms of the protection conferred by the aforementioned regulation.

The collection and processing of data is the responsibility of CICECO and its storage is properly protected, only authorized CICECO employees can access the information within the scope of their functions, always being clear in the respective collection forms the purposes for which they are intended. The remaining issues to be considered in this matter will be handled by the University of Aveiro in accordance with the regime established by the GDPR.

Cookies policy

Cookies are small files with alphanumeric information that are stored on your computer's hard drive by your browser and are intended to improve the user experience and enhance website navigation.

Collection and use of technical information

The cookies used on CICECO are anonymous, and no information about our users that allows their personal identification is stored in them.

The technical information recorded consists of:

  • iP (Internet Protocol) address of the visitor;
  • the type of internet browser used by the website visitor and the respective operating system used;
  • the date and time of the consultation;
  • the pages visited on the site and the documents downloaded
  • The technical information collected is used for statistical purposes only.

Cookies used

Session cookies

These cookies are used to record user preferences, such as the language in which websites are displayed or to maintain authenticated user sessions, and are automatically deleted when the browser is closed.

Persistent cookies

These cookies store information that is needed between sessions. For example, a persistent cookie is set to record that you have been made aware of the cookie policy so that the message regarding this policy is not shown again the next time you visit the website. This cookie remains on the computer until it reaches its expiry date or is deleted by the user.

Data protection

The present privacy policy covers the Information System of the University of Aveiro (SIUA), governed by the General Data Protection Regulations (RGPD) Regulation (EU) No. 2016/679, of April 27th, 2016.

Data Protection Officer

The University of Aveiro has a Data Protection Officer (DPO), who ensures compliance of the processing of personal data with the legislation in force, and is available through the following email address epd@ua.pt.

Close