Proceedings of 1st Corrosion and Materials Degradation Web Conference最新文献_第2页

Covalent surface modification of 2024 aluminum alloy surface by self-assembly dodecyl phosphate film towards corrosion protection 自组装十二烷基磷酸膜对2024铝合金表面的共价表面改性

Proceedings of 1st Corrosion and Materials Degradation Web Conference Pub Date : 2021-05-14 DOI: 10.3390/cmdwc2021-10040

Da-Hai Xia, C. Pan, Shi-zhe Song, Weixian Jin, Wenbin Hu, Baomin Fan

{"title":"Covalent surface modification of 2024 aluminum alloy surface by self-assembly dodecyl phosphate film towards corrosion protection","authors":"Da-Hai Xia, C. Pan, Shi-zhe Song, Weixian Jin, Wenbin Hu, Baomin Fan","doi":"10.3390/cmdwc2021-10040","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10040","url":null,"abstract":"s: This work was to prepare a layer of dodecyl phosphate (DDPO4) film on 2024 aluminum alloy substrate for corrosion protection by self-assembling. The prepared DDPO4 self-assembly monolayers (SAMs) properties were characterized by X-ray photoelectron spectroscopy (XPS), water contact angle measurement (CA), and electrochemical impedance spectroscopy (EIS). Experimental results indicated that DDPO4 was successfully assembled on aluminum alloy substrate via covalent bond attachment. The modified surface was hydrophobic due to the DDPO4 attached to the oxide surface and a hydrocarbon tail-up orientation. In order to build a molecular adsorption dynamics model, the impact of temperature and pH values for assembling process has also been evaluated. Accelerated corrosion test showed that the DDPO4 modified 2024 aluminum alloy substrate exhibited excellent corrosion resistance in an electrolyte containing 0.01M Cl − + 0.01M SO 42− , and no apparent corrosion pits were observed after an exposure of 96 h. The charge transfer resistance of the DDPO4 covered aluminum alloy was ∼ 100 times larger than that of the blank aluminum alloy. The results of molecular dynamic (MD) simulation for DDPO4 adsorbed on the Al 2 O 3 (110) face indicate that the head group of DDPO4 is the active group and bind as tridentate with the O in P=O bond can adsorbed on the Al 2 O 3 surface.","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76188595","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

Passive film evolution over 2.5 years of lean-duplex stainless steel reinforcements embedded in mortar containing chlorides 在含有氯化物的砂浆中嵌入精益双相不锈钢增强材料的钝化膜演化超过2.5年

Proceedings of 1st Corrosion and Materials Degradation Web Conference Pub Date : 2021-05-14 DOI: 10.3390/cmdwc2021-10047

Ulises Martin Diaz, J. Bosch, J. Ress, D. Bastidas

引用次数: 0

Corrosion of steel in synthetic fly ash pore solution 钢在合成粉煤灰孔隙溶液中的腐蚀

Proceedings of 1st Corrosion and Materials Degradation Web Conference Pub Date : 2021-05-14 DOI: 10.3390/cmdwc2021-10048

Juan Bosch Giner, D. Bastidas, U. Martin, J. Ress

引用次数: 0

Cresol red as corrosion inhibitor in chitosan thin layers on zinc 甲酚红在壳聚糖薄层锌表面的缓蚀作用

Proceedings of 1st Corrosion and Materials Degradation Web Conference Pub Date : 2021-05-14 DOI: 10.3390/cmdwc2021-10043

Regina- Henriett Buier, G. Szabó, L. Muresan

引用次数: 0

Corrosion resistance of aluminium against salt hydrates used for latent heat storage by using different coating materials 不同涂层材料对潜热储用盐水合物铝的耐蚀性研究

Proceedings of 1st Corrosion and Materials Degradation Web Conference Pub Date : 2021-05-14 DOI: 10.3390/cmdwc2021-10045

M. P. Alferez Luna, Franziska Klünder, S. Gschwander

引用次数: 0

Corrosion of AZ31 with LDH conversion coatings loaded with inorganic inhibitors. 载无机缓蚀剂的LDH转化涂层对AZ31的腐蚀。

Proceedings of 1st Corrosion and Materials Degradation Web Conference Pub Date : 2021-05-14 DOI: 10.3390/cmdwc2021-10041

B. Pillado, M. Mohedano, R. del Olmo, B. Mingo, E. Matykina, R. Arrabal

{"title":"Corrosion of AZ31 with LDH conversion coatings loaded with inorganic inhibitors.","authors":"B. Pillado, M. Mohedano, R. del Olmo, B. Mingo, E. Matykina, R. Arrabal","doi":"10.3390/cmdwc2021-10041","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10041","url":null,"abstract":": Layered Double Hydroxides (LDHs) coatings were developed for corrosion protection of AZ31 Mg alloy. LDH coatings were fabricated under co-precipitation conditions and applied under hydrothermal conditions. Two different systems Zn-Al LDH and Li-Al LDH were studied. Specimens were post-treated via immersion for 2 h at 45 ºC in Na 2 WO 4 ·H 2 O or LiNO 3 baths respectively, to produce Zn-Al LDH(W) and Li-Al LDH(Li). The characterization of the coatings was carried out by field-emission scanning electron microscope (FESEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The corrosion process was studied by electrochemical impedance spectroscopy (EIS) and scanning vibrating electrode technique (SVET). Surface was also evaluated by water drop contact angle and paint adhesion test by using an epoxy primer. The characterization of the coating revealed two-layered coatings with a denser inner layer and a flaky outer layer. Both coatings improved the corrosion resistance of the AZ31 alloy. Loading with inhibitor further increased the corrosion resistance by one order of magnitude (Bare substrate, Z 10mHz ⁓ 102 Ω cm2 ; LDH, Z 10mHz ⁓ 103-4 Ω cm2 ; LDH-inhibitor, Z 10mHz ⁓ 105 Ω cm2 ).","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87053295","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

Microencapsulated corrosion inhibitors for controlled release in simulated concrete pore solutions 微封装缓蚀剂控制释放模拟混凝土孔隙溶液

Proceedings of 1st Corrosion and Materials Degradation Web Conference Pub Date : 2021-05-13 DOI: 10.3390/cmdwc2021-10037

D. Bastidas, J. Ress, Ulises Diaz, J. Bosch

引用次数: 0

Corrosion resistance of electroless nickel-boron coating in a bath exempt from stabilizer 化学镀镍硼涂层在不含稳定剂的镀液中的耐蚀性

Proceedings of 1st Corrosion and Materials Degradation Web Conference Pub Date : 2021-05-13 DOI: 10.3390/cmdwc2021-10038

Muslum Yunacti, Alexandre Mégret, A. Montagne, V. Vitry

{"title":"Corrosion resistance of electroless nickel-boron coating in a bath exempt from stabilizer","authors":"Muslum Yunacti, Alexandre Mégret, A. Montagne, V. Vitry","doi":"10.3390/cmdwc2021-10038","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10038","url":null,"abstract":": Electroless nickel-boron (ENB) coatings from borohydride-reduced bath have received wide acceptance thanks to their excellent hardness and superior wear resistance. Therefore, they have been considered as an alternative to hard chrome. However, the presence of a small amount of toxic heavy metals such as Pb or Tl in the plating bath restricts their application. These metallic salts are used to stabilize the bath, which is necessary to avoid abrupt decomposition, and are harmful towards the environment. A new bath, that is exempt from stabilizer, was designed for ENB plating. In this bath, the bath stability is achieved through the optimization of the concentration of complexing agent, pH adjuster, and reducing agent. An ENB coating from the new bath presents promising properties including modified surface morphology, excellent hardness, low friction coefficient, etc. Salt spray test (ASTM B117-07) and potentiodynamic polarization test results showed that the new ENB coating has a significantly better corrosion resistance than the conventional ENB coatings stabilized by Pb or Tl salts. In conclusion, the present ENB coating is produced in an environmentally friendly bath, and the deposit presents properties close to those of the conventional ENB deposit.","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79730985","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

Investigation of the anti-corrosive effect of tannic acid embedded in silica coatings on Zn substrates 锌基二氧化硅涂层中单宁酸的防腐效果研究

Proceedings of 1st Corrosion and Materials Degradation Web Conference Pub Date : 2021-05-13 DOI: 10.3390/cmdwc2021-10035

J. Both, G. Szabó, L. Muresan

{"title":"Investigation of the anti-corrosive effect of tannic acid embedded in silica coatings on Zn substrates","authors":"J. Both, G. Szabó, L. Muresan","doi":"10.3390/cmdwc2021-10035","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10035","url":null,"abstract":"Abstract: The replacement of environmentally harmful chromate coatings has been of great interest to the electrochemical industry. Compact silica coatings are a widely discussed inorganic coating alternative, to replace previously used toxic materials. Silica offers a feasible and simple method of passive corrosion protection, with the option of enhancement by incorporating different inhibitors into the matrix. Tannic acid is a non-toxic substance, that acts as cathodic corrosion inhibitor, by forming metal-tannate protective barriers. [1,2] The present study discusses the addition of different concentrations of tannic acid in nano-scale silica coatings, which were prepared by sol-gel technique and dip-coating method on Zn substrates. Long term corrosion measurements were carried out on the prepared substrates to check their durability and corrosion resistance. The thin layers were characterized by Electrochemical Impedance Spectroscopy (EIS) and Potentiodynamic Polarization Curves. It has been concluded that silica coatings containing tannic acid show promising EIS values and corrosion current densities, compared to the simple silica coatings. \u0000References: \u0000 [1] E.Kushimerek, E. Chrzescijanska, Mater. Corros., 2015, 66(2), 169-174. \u0000[2] B. Qian, B. Han, M. Zheng, Corros. Sci., 2013, 72, 1-9.","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90184467","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

Investigation of structural properties and corrosion inhibition mechanism of green corrosion inhibitors for mild steel in acidic media 绿色缓蚀剂对低碳钢在酸性介质中的结构性能及缓蚀机理的研究

Proceedings of 1st Corrosion and Materials Degradation Web Conference Pub Date : 2021-05-12 DOI: 10.3390/cmdwc2021-10032

S. Khan, Muhammad Hussain, M. Quraishi

{"title":"Investigation of structural properties and corrosion inhibition mechanism of green corrosion inhibitors for mild steel in acidic media","authors":"S. Khan, Muhammad Hussain, M. Quraishi","doi":"10.3390/cmdwc2021-10032","DOIUrl":"https://doi.org/10.3390/cmdwc2021-10032","url":null,"abstract":": Mild steel is often used in the construction of reaction vessels, storage tanks, and petroleum refineries, but it is heavily damaged by acid solutions. Despite ongoing developments in the production of corrosion-resistant materials, chemical inhibitors are also the most realistic and cost-effective method of corrosion prevention. Mild steel corrosion has been shown to be inhibited by organic compounds containing nitrogen, sulphur, oxygen, and heterocyclic compounds with a polar functional group and a conjugated double bond. Organic inhibitors come in a variety of forms, but the majority of them are both costly and harmful. As a result, finding low-cost and environmentally sustainable inhibitors remains a priority. A small number of non-toxic compounds from the pharmaceutically active compounds have been studied for their mild steel corrosion inhibition properties in acid media. Plant extracts are abundant in corrosion inhibitors that are safe for the environment. The extracts from the plant are non-toxic and easy to obtain. Many organic compounds with polar atoms like O, N, P, and S can be found in these extracts. Protective films are created as they are adsorbed onto the metal surface by these polar atoms. These ingredients adsorb according to a number of isotherms. By analysing data from weight loss measurements, tafel polarisation, and EIS investigations, we have studied structural features of a few green corrosion inhibitors and their mechanism of corrosion inhibition.","PeriodicalId":20503,"journal":{"name":"Proceedings of 1st Corrosion and Materials Degradation Web Conference","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-05-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75164775","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