Metal is widely used in various industrial fields such as transportation because of its physical and mechanical strength. However, during its utilization, metal materials are often damaged by corrosion due to chemical reactions between the metal surface and the surrounding environment. Coating is one way to prevent corrosion by isolating metal surfaces from the environment. Conventional anti-corrosion coatings generally use chromate and phosphate-based materials. However, this material has been banned in some countries because it is toxic to the environment. Meanwhile, other methods with the addition of more active metals such as magnesium are considered unaffordable. Therefore, the researchers developed alternative materials that are environmentally friendly and reduce costs by using metal oxide-based materials such as Silicon dioxide (SiO 2 ). The advantage of SiO 2 is that it is chemically stable and harmless. SiO 2 modification produces hydrophobic properties which increase corrosion resistance. One of the methods to make SiO 2 is sol-gel method. The advantages of sol-gel method are simple, affordable, capable of forming a film for attaching chemical properties, flexible for incorporation with other compounds and the coating can be applied in several ways, such as dip coating, spray coating, electrophoretic deposition (EPD), etc. As an anti-corrosion coating, products can be tested for their resistance by analyzing the corrosion rate. This paper reviews silica-based metal coatings as anti-corrosion. The scope of the discussion in this paper is the mechanism, fabrication route, application technique, characterization, and analysis of anti-corrosion ability by studying the corrosion rate of anti-corrosion silica-based coating products for metal substrates.

Silviana Silviana

Candra Lukmilayani

Defect and diffusion forum/Diffusion and defect data, solid state data. Part A, Defect and diffusion forum

Defect and Diffusion Forum (formerly Part A of ''Diffusion and Defect Data'') is designed for publication of up-to-date scientific research and applied aspects in the area of formation and dissemination of defects in solid materials, including the phenomena of diffusion.  In addition to the traditional topic of mass diffusion, the journal is open to papers from the area of heat transfer in solids, liquids and gases, materials and substances. All papers are peer-reviewed and edited.    Members of Editorial Boards and Associate Editors are invited to submit papers for publication in “Defect and Diffusion Forum” .  Authors retain the right to publish an extended and significantly updated version in another periodical.

Defect and Diffusion Forum is a journal dedicated to the publication of current scientific research and applied aspects concerning the formation and dissemination of defects in solid materials, including diffusion phenomena. In addition to traditional topics of mass diffusion, the journal welcomes papers related to heat transfer in solids, liquids, and gases, as well as materials and substances. All submitted papers undergo peer review and editing. Members of the Editorial Board and Associate Editors are invited to submit papers for publication in Defect and Diffusion Forum. Authors retain the right to publish an extended and significantly updated version in another periodical.

《Defect and Diffusion Forum》是一个专注于固体材料中缺陷形成与扩散现象的科学研究与应用的期刊（前身为《Diffusion and Defect Data》的A部分）。该期刊不仅涵盖传统的质量扩散主题，还欢迎涉及固体、液体和气体中的热传导、材料与物质等领域的论文。所有提交的论文均经过同行评审和编辑。期刊的编辑委员会成员和副编辑被邀请提交论文。作者保留在其他期刊上发表扩展和显著更新版本的权利。

Metal Coatings Derived from Modified Silica as Anti-Corrosion

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