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Protection of steel hooks embedded in glass-fiber-reinforced concrete against macrocell corrosion

Petroleum Research 2024年第2期9卷 317-326页

作者： husnu gerengi Muhammed Maraşlı Marziya Rizvi Beni Kohen Ismail Taşkıran Corrosion Research Laboratory Department of Mechanical EngineeringDuzce University81620DuzceTurkey Department of Engineering and Applied Sciences University of BergamoBGItaly Fibrobeton Company R&D Center DuzceTurkey Department of Chemistry Babasaheb Bhimrao Ambedkar UniversityLucknow226003U.PIndia

This study evaluated the corrosion behavior of steel hooks embedded in GFRC,which were protected by a zinc-rich(96%Zn)galvanizing *** coating provided the hooks with active cathodic protection and a passive physical *** corrosion may form when the anode is smaller than the total steel ***,the steel hooks at the embedment juncture were additionally sealed against water ingress and air exchange using a construction *** study was conducted in three phases in a salt-spray ***,the electrogalvanized steel hooks embedded in GFRC were allowed to freely corrode for 7 *** the second phase,the electrogalvanized steel hooks were painted with the zinc-rich coating and observed over 7 *** the third phase,the steel hooks were protected by the zinc-rich coating together with a primer and construction sealant,and observed over 7 *** evaluate the electrogalvanized hooks and the corrosion products formed,the thickness of the material was *** on the metal surface was inferred by studying the surface morphology of the hooks at various points of contact and after different periods of time.

关键词： Steel rebars Concrete corrosion GFRC Galvanization Sealant

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Exploration of Green Alternatives to 6PPD (P-Phenylenediamine) Used as Antiozonant and Antioxidant in the Rubber Industry

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Materials Sciences and Applications 2024年第4期15卷 87-100页

作者： Emine Demir husnu gerengi Kerem Savcı Gasim Altundal Canan Yüksel Doğaç Çağıl Anlas Tyre Company R&D Center D&#252zce T&#252rkiye Department of Mechanical Engineering Faculty of Engineering D&#252zce University D&#252zce T&#252rkiye The Koc High School &#304stanbul T&#252rkiye

Antiozonants and antioxidants are additives commonly used in the rubber industry to enhance the durability and performance of rubber products. Ozone, present in the atmosphere, can cause rubber to degrade over time through a process known as ozone cracking. These rubber additives are added to rubber compounds to protect against this degradation. They work by reacting with ozone, preventing it from attacking and breaking the molecular chains in the rubber, helping to maintain the structural integrity of the rubber product. It is now well known that 6PPD contributes to the extension of the service life of rubber products. However, recent studies have shown that 6PPD can be harmful to the environment, especially when end-of-life tyres (ELTs) are contaminated with the water. With the effect of ozone, 6PPD is converted to 6PPD quinone, which is toxic enough to kill some sensitive fish species such as Coho Salmon (Oncorhynchus kisutch). This study drew attention to new chemical compounds and natural products that can be used as antiozonants and antioxidants in the rubber industry instead of 6PPD. Although the scientific studies are promising, the fact that 6PPD is still used in production shows that more scientific studies and social awareness need to be developed in this area.

关键词： 6PPD Coho Salmon Antiozonant Antioxidant

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Exploration of Green Alternatives to 6PPD (P-Phenylenediamine) Used as Antiozonant and Antioxidant in the Rubber Industry

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Materials Sciences and Applications（材料科学与应用期刊） 2024年第4期 87页

作者： Emine Demir husnu gerengi Kerem Savcı Gasim Altundal Canan Yüksel Doğaç Çağıl

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Investigation of the Potential of Using Liquid Rubbers in Rubber Industry

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Journal of Materials Science and Chemical Engineering 2023年第9期11卷 21-30页

作者： Emine Demir Gasim Altundal husnu gerengi Canan Yüksel Anlas Tyre Company R&D Center Düzce Türkiye Department of Mechanical Engineering Faculty of Engineering Düzce University Düzce Türkiye

Along with the developing technology in the rubber industry, the use of natural and synthetic rubbers as well as liquid rubbers has increased significantly in recent years. The formulation of the tread compound, which directly affects the performance of a tire, is generally produced from natural and synthetic rubbers. Intensive scientific studies have been carried out on liquid rubbers because they reduce the consumption of process oils used in the tire production phase and increase dispersion. In this study, the rheological and physico-mechanical properties of rubbers developed using only liquid rubber (liquid isoprene and liquid SBR) with four different viscosities and without using process oil (Styrene Butadiene Rubber—SBR) were investigated. It has been observed that the rubber blends produced by adding four different liquid rubbers to the same recipe caused changes in rheological and physico-mechanical properties compared to the reference sample. It was observed that the minimum torque/viscosity (ML), maximum torque/viscosity (MH) and curing time (t90) in some of the formulas tested decreased significantly due to the use of liquid rubber.

关键词： Natural Rubber Liquid Rubber SBR Isoprene

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