Zastita materijala最新文献

Influence of sodium chloride on corrosion resistance of ever silver vessels in the presence of curd rice 氯化钠对有凝乳米存在的银制容器耐腐蚀性的影响

Zastita materijala Pub Date : 2024-07-26 DOI: 10.62638/zasmat1173

Thangarajan Umamathi, Venkatachalam Prathipa, Arockiam Roslin, Arockiaraj Little Jewelcy, Micheal Velankanni Jeevithe Clara, Nilavan Anitha, Mohamed Ibrahim Nasrin Sahana, Rajendran Susai, Arjunan Krishnaveni

{"title":"Influence of sodium chloride on corrosion resistance of ever silver vessels in the presence of curd rice","authors":"Thangarajan Umamathi, Venkatachalam Prathipa, Arockiam Roslin, Arockiaraj Little Jewelcy, Micheal Velankanni Jeevithe Clara, Nilavan Anitha, Mohamed Ibrahim Nasrin Sahana, Rajendran Susai, Arjunan Krishnaveni","doi":"10.62638/zasmat1173","DOIUrl":"https://doi.org/10.62638/zasmat1173","url":null,"abstract":"The present work is undertaken to investigate the corrosion resistance of ever silver in the presence of water, water+curd system, water+curd+rice system, water+curd+rice+Salt system. The corrosion resistance has been evaluated by AC impedance spectra . AC impedance spectra have been employed to investigate the corrosion resistance of ever silver electrode when it is immersed in various test solutions like water, curd, curd rice recipe, curd rice recipe with salt (sodium chloride 500 ppm). The corrosion resistance of ever silver electrode when it is immersed in various test solutions like water, water+curd, water+curd+rice and water+curd+rice+salt have been evaluated by AC impedance spectroscopy. If a protective film is formed, the charge transfer resistance increases, impedance value increases, phase angle value increases and double layer capacitance (Cdl) value decreases. When Ever silver electrode is immersed in water + curd rice system + 500ppmsodium chloride system, the corrosion resistance of ever silver electrode decreases. This is due to the presence of chloride ion introduced into the curd rice system. It implies that when curd rice is packed in vessels made of ever silver, we should avoid adding salt to the curd rice. It is better to keep the salt and curd rice separately. It is to be noted that this corrosion resistance is better than the corrosion resistance in water alone. The corrosion resistance decreases in the following order: Water + Curd + Rice system > Water + Curd + Rice + Salt system (sodium chloride 500ppm) > Water+ Curd system > Water","PeriodicalId":23842,"journal":{"name":"Zastita materijala","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141800129","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Protection from ballistic threats: an exploration of textile materials for bullet-resistant outerwear 防范弹道威胁：防弹外衣纺织材料探讨

Zastita materijala Pub Date : 2024-07-26 DOI: 10.62638/zasmat1202

Subrata Das, Kaliappan Prathasana, Pathipalayam Arumugam Nitin, Krishnan Ramamoorthi Lakshimi JayaPriya, Vemban Mathivanan

引用次数: 0

Evaluating the water quality of a Kondakarla Ava Lake for agricultural endeavours in Visakhapatnam, India 评估印度维萨卡帕特南 Kondakarla Ava 湖的水质，促进农业发展

Zastita materijala Pub Date : 2024-07-18 DOI: 10.62638/zasmat1172

Sirisha Korrai, B.Vinay Sagar, Madhavi Earle, Sangeetha Sankhyayani Achanta, Hemanshu Mediboyana

引用次数: 0

The effect of anodization and subsequent treatments on corrosion resistance of aluminium 阳极氧化及后续处理对铝抗腐蚀性能的影响

Zastita materijala Pub Date : 2024-07-18 DOI: 10.62638/zasmat1174

Marija Mitrović, Milena Milovanović, Nebojša Vasiljević, Milorad Тоmić

{"title":"The effect of anodization and subsequent treatments on corrosion resistance of aluminium","authors":"Marija Mitrović, Milena Milovanović, Nebojša Vasiljević, Milorad Тоmić","doi":"10.62638/zasmat1174","DOIUrl":"https://doi.org/10.62638/zasmat1174","url":null,"abstract":"Aluminium samples were chemically prepared by following operations: degreasing, etching I, etching II, and brightening), prior to anodizing in sulfuric acid. Aluminium surface area was 0.2 dm2. The composition of used aluminium samples was determined by the energy dispersive X-ray spectroscopy. Chemically prepared aluminium samples were electrochemically anodized for 45 minutes in a solution of 190 gdm-3 H2SO4 at room temperature, at a current density of 1.7 Adm-2. In the anodizing process, the aluminium sample served as the anode, with lead cathodes. After anodizing, the aluminium samples underwent a colouring process in five pairs of solutions (systems), where each system consisted of two solutions of inorganic salts RxA + RxB (x = 1-5, numbers of solutions). Colouring of the anodized aluminium was carried out at room temperature by immersing the samples in each solution for 7 minutes (e.g., R1A + R1B, τ =7 min + 7 min). Each used colouring system provides a different colour: green-yellow, brown, light-grey, blue, and orange-gold. After colouring, the samples were treated in a special solution to improve corrosion resistance and silication, resulting in a change in the obtained colour shade. All obtained colours were stable with very nice appearance, allowing such coloured aluminium to be used for decorative purposes. The corrosion resistance of the coloured anodized aluminium samples was investigated by determining the corrosion potential, corrosion current and polarization resistance using potentiodynamic polarization method, as well as by electrochemical impedance spectroscopy. A common feature of all tested samples is a significant improvement in the corrosion resistance of the anodized aluminium after colouring and subsequent treatment in the corrosion resistance improvement solution, particularly after the additional silane treatment.","PeriodicalId":23842,"journal":{"name":"Zastita materijala","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141826164","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Waste tyres pyrolysis oil (WTPO) as an alternative source of fuel and chemicals: a review 废轮胎热解油（WTPO）作为燃料和化学品的替代来源：综述

Zastita materijala Pub Date : 2024-07-18 DOI: 10.62638/zasmat1153

Bashir Abdu Muzakkari, Amina Salihi Bayero, Musa Ibrahim Mohammed, Pramod K. Singh, Umar Muhammad Jibreel

{"title":"Waste tyres pyrolysis oil (WTPO) as an alternative source of fuel and chemicals: a review","authors":"Bashir Abdu Muzakkari, Amina Salihi Bayero, Musa Ibrahim Mohammed, Pramod K. Singh, Umar Muhammad Jibreel","doi":"10.62638/zasmat1153","DOIUrl":"https://doi.org/10.62638/zasmat1153","url":null,"abstract":"Waste tyres are dumped and common kind of abandon solid waste. Almost 3 billion tyres are produced each year and each tyre produced will eventually join the waste products and if not properly handled will become pollutant. In many countries disposal of waste tyres is prohibited; as an alternative they should be recovered and recycled instead. In this review pyrolysis was introduced as an alternative way of recycling waste tyres, Pyrolysis allows the dissolution of the waste and it also produces useful by-products. The products obtained during the process are pyrolysis oil, pyrolysis char and condensable gas. Pyrolysis oil is the major product among them, this paper reviewed pyrolysis oil as an alternative sources of fuel to diesel engines and as well to highlight the chemicals obtained in the waste tyres from the pyrolysis oil which mainly depends on the kind of feedstock (i.e. type of tyres e.g truck, cars, bicycle) used in the pyrolysis process. Most of the compounds obtained are Aliphatic and Aromatic hydrocarbons (especially the Polycyclic Aromatic Hydrocarbon PAHs) such as Naphthalene – NAP, Acenaphthylene – ACY, Acenaphthene –ACE, Fluorene – FLU, Phenanthrene – PHE, Anthracene – ANT, Fluoranthene–FLT, Pyrene–PYR, Benzo[a]anthracene – BAA, Chrysene – CRY, Benzo[b]fluoranthene – BBF, Benzo[k[fluoranthene – BKF, Benzo[a]pyrene – BAP, Dibenzo[a,h]anthracene – DBA, Benzo[g,h,i]perylene – BGP, Indeno[1,2,3-cd]pyrene – IND among others. Consequently, the pyrolysis oil obtained need further upgrading via a reaction pathways are hydrodesulfurization (HDS), hydrodearomatization (HDA) and hydrocracking (HC) which can be achieved through a 2-stage hydroprocessing strategy regarding WTPO composition in terms of HDS, HAD and HC. Pyrolysis oil from waste tyres can be used as a substitute for diesel and as well as sources of raw materials and fuel to organic chemical industries.","PeriodicalId":23842,"journal":{"name":"Zastita materijala","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141826236","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Comparative study of various volcanic materials as fillers in polymer composites 将各种火山岩材料作为聚合物复合材料填料的比较研究

Zastita materijala Pub Date : 2024-07-18 DOI: 10.62638/zasmat1171

L. Melnyk, Lev Chernyak, V. Sviderskyy, Ludmila Vovchenko, Viktoria Yevpak

引用次数: 0

Antifungal coating for wood protection 保护木材的防霉涂层

Zastita materijala Pub Date : 2024-07-18 DOI: 10.62638/zasmat1167

Guadalupe Canosa, C. Giúdice, P. V. Alfieri

引用次数: 0

Effect of corrosion inhibitors on internal corrosion in oil pipelines: a brief review 缓蚀剂对石油管道内部腐蚀的影响：简要回顾

Zastita materijala Pub Date : 2024-07-18 DOI: 10.62638/zasmat1161

Esraa Razaq, S. A. Abdulsada

引用次数: 0

Examining the impact of anisotropic particle orientation in a polymer matrix on the electrical properties of composite materials 研究聚合物基体中各向异性颗粒取向对复合材料电气性能的影响

Zastita materijala Pub Date : 2024-07-18 DOI: 10.62638/zasmat1110

Anna Stepashkina, Khurram Shehzad

引用次数: 0

Influence of rice husk ash inclusion on electrical characteristics of dry cement mortar 稻壳灰对干水泥砂浆电气特性的影响

Zastita materijala Pub Date : 2024-07-18 DOI: 10.62638/zasmat1051

Etuk Sunday Edet, Robert Ubong Williams, O. Agbasi, Inyang Namdie Joseph

{"title":"Influence of rice husk ash inclusion on electrical characteristics of dry cement mortar","authors":"Etuk Sunday Edet, Robert Ubong Williams, O. Agbasi, Inyang Namdie Joseph","doi":"10.62638/zasmat1051","DOIUrl":"https://doi.org/10.62638/zasmat1051","url":null,"abstract":"Rice husk is usually generated as waste in large quantities but yet to be optimally utilized. Due to the pollution effects associated with poor approach prevalently adopted for its disposal, valorizing it into economical and sustainable material for building construction is a necessary option to provide solution for future generation. In this research, separate dry mortars were prepared using cement grades 32.5R and 42.5N and the influence of rice husk ash (RHA) inclusion on their electrical characteristics was investigated. The materials used were batched by volume and the RHA was utilized as a partial substitute for cement at 10 % level. All the samples were cured for 21 days and then allowed to dry completely prior to the tests implementation. The results showed decrease in electrical resistance with temperature (ranging from 20oC to 50oC) due to incorporation of the RHA. Though samples with the RHA content possessed ability to act as smart mortars for temperature monitoring/sensing, utilization of cement grade 42.5N ensured a better performance. By utilizing rice husks in such undertakings, their associated disposal problems could be tackled and construction of inexpensive but sustainable building with large temperature sensing capability could be enhanced.\u0000 ","PeriodicalId":23842,"journal":{"name":"Zastita materijala","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2024-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141826210","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0