Self-healing coatings for steel

Kumar, Ashok; Stephenson, L. D.; Murray, John N.

doi:10.1016/j.porgcoat.2005.11.010

Cited by 209 publications

(91 citation statements)

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“…Despite their clear advantages, such coatings have one major drawback: self-healing is possible only in the case of the first damage to the coating. Moreover, the incorporated particles may adversely affect the adhesion of the coating to the substrate [31,46,67,75,76]. In order to minimize this adverse effect, the micro/nanocontainer material should be matched to the coating material.…”

Section: Coatings Containing Micro-or Nanocapsulesmentioning

confidence: 99%

Self-healing coatings in anti-corrosion applications

2013

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Nonmetallic (based on polymers or oxides) and metallic protective coatings are used to protect metal products against the harmful action of the corrosion environment. In recent years, self-healing coatings have been the subject of increasing interest. The ability of such coatings to self-repair local damage caused by external factors is a major factor contributing to their attractiveness. Polymer layers, silica-organic layers, conversion layers, metallic layers and ceramic layers, to mention but a few, are used as self-healing coatings. This paper presents the main kinds of self-healing coatings and explains their selfhealing mechanisms.

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Section: Coatings Containing Micro-or Nanocapsulesmentioning

confidence: 99%

Self-healing coatings in anti-corrosion applications

2013

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“…50,51 While corrosion inhibition can indeed be recovered by applying conventional, polymerisation based healing to polymer coatings, many have also investigated the deposition of corrosion and rust inhibiting film formers into areas of damage. Similar to the previously discussed self-healing systems, microcapsules have been shown to successfully deliver these film forming compounds (which have included organic molecules, organic salts 52 and inorganic salts 53 ) to the damaged regions of coatings and subsequently inhibit metal corrosion and rusting. Another intuitive delivery approach was recently developed by Shchukin and coworkers where the film forming compounds were incorporated into thin layers of polyelectrolytes, which were either directly coated on the metal surface or layered on SiO 2 nanoparticles embedded in a coating.…”

Section: Microencapsulated Healing Agentsmentioning

confidence: 93%

Self-healing polymers and composites

Mauldin¹,

Kessler²

2010

International Materials Reviews

236

136

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Inspired by the unique and efficient wound healing processes in biological systems, several approaches to develop synthetic polymers that can repair themselves with complete, or nearly complete, autonomy have recently been developed. This review aims to survey the rapidly expanding field of self-healing polymers by reviewing the major successful autonomic repairing mechanisms developed over the last decade. Additionally, we discuss several issues related to transferring these self-healing technologies from the laboratory to real applications, such as virgin polymer property changes as a result of the added healing functionality, healing in thin films v. bulk polymers, and healing in the presence of structural reinforcements.

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“…Salt spray tests yield important information on pitting, intergranular and general corrosion. Mechanisms may also be quantified by optical microscopy and laser profilometry (Kelly et al, 2002;Walton et al, 2012). Electrochemical noise measurement supplies statistical parameters (electrochemical noise resistance, coefficient of variation of current and localization index) and parameters derived from shot noise are related to the type and rate of corrosion (Sanchez-Amaya et al, 2005). 7.2.2 The use of corrosion inhibitors Corrosion inhibitors are chemicals that can significantly decrease the corrosion rate at very low concentration and where their concentration does not change.…”

Section: Monitoring Of Corrosionmentioning

confidence: 99%

“…To preserve the continuity of the coating under wet conditions, drying of healing liquid must be accelerated. Efforts have been made towards combinations of healing agents and corrosion inhibitors reducing the decay of metal substrate during the healing process (Selvakumar et al, 2012;Kumar et al, 2006).…”

Section: Nano-and Micro Encapsulation Techniquesmentioning

confidence: 99%

The use of nano-/microlayers, self-healing and slow-release coatings to prevent corrosion and biofouling

Telegdi

Szabó

Románszki

et al. 2014

Handbook of Smart Coatings for Materials Protection

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The mitigation of corrosion and biofouling is a challenge. Through application of chemicals and special techniques can slow these undesired processes, an effective resolution requires a multidisciplinary approach involving scientists, engineers, and metallurgists. In order to understand the importance of the use of nano-and microlayers as well as selfhealing coatings, the basic concepts of corrosion, corrosion mechanisms, corrosion inhibition and the microbiologically influenced corrosion will be summarised. The preparation, characterization and application of Langmuir-Blodgett and self assembled nanolayers in corrosive and microbial environment will be discussed. Preparation and characterization of microcapsules/ microspheres and their application in coatings will be demonstrated by a number of examples.Keywords: nano-and microcoating, self-healing, slow-release, anticorrosion, antifouling IntroductionCorrosion is a well-known problem all over the world. It consumes a significant part of the gross national product (GDP) of developed and developing countries. A number of authors have provided comprehensive introductions to corrosion mainly in aqueous and wet environments (Jones, 1991;Kaesche, 2003; McCafferety, 2010). Corrosion is the destructive result of the chemical/electrochemical reactions between metals and the environment. Corrosive reactions involve water in either liquid or condensed phases. Most corrosion reactions are electrochemical processes. These involve electron or charge transfer in aqueous solution which leads to metal dissolution (anodic reaction). Depending on the pH of the solution, either hydrogen or hydroxonium ions evolve, resulting in oxides, oxyhydroxides, hydroxides and salts formed on the metal surface (cathodic reaction). The electrochemical potential or electron activity affects the rate of corrosion reaction. To understand corrosion it is necessary to discuss briefly the types of corrosion and the reactions involved.Corrosion occurs in various forms.-Uniform corrosion: The metal surface must be compositionally uniform; the aggressive environment has the same access to all parts of the metal. This type of

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Self-healing coatings for steel

Cited by 209 publications

References 0 publications

Self-healing coatings in anti-corrosion applications

Self-healing coatings in anti-corrosion applications

Self-healing polymers and composites

The use of nano-/microlayers, self-healing and slow-release coatings to prevent corrosion and biofouling

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