{"title":"Corrosion Behaviour of Boronized Ductile irons in Formic and Nitric Acid Solutions","authors":"Gülcan Toktaş, Selman Korkmaz","doi":"10.1134/S207020512470182X","DOIUrl":null,"url":null,"abstract":"<p>The corrosion behavior of boronized Cu, Ni, and Mo-alloyed and unalloyed ductile irons in two acid solutions was investigated using the gravimetric method. Ductile irons were pack boronized at 900 and 950°C for 2, 4, 6, and 8 h. The boride-layer compounds were detected using X-ray analysis. Boronized and untreated irons were immersed in 10 wt % formic acid and 10 wt % nitric acid solutions for 14 days (336 h). Every two days, mass losses were measured, and corrosion rates were estimated using these results. The corroded surfaces were examined with scanning electron microscopy. Untreated alloyed ductile cast iron lost less mass in both acid solutions than unalloyed cast iron. Pitting is the most common type of corrosion in formic acid solution. Higher corrosion rates after 48 h of immersion decreased dramatically in 96 h for all irons due to the passivation effect of the nitric acid solution.</p>","PeriodicalId":745,"journal":{"name":"Protection of Metals and Physical Chemistry of Surfaces","volume":"60 3","pages":"535 - 543"},"PeriodicalIF":1.1000,"publicationDate":"2024-12-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Protection of Metals and Physical Chemistry of Surfaces","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1134/S207020512470182X","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}
引用次数: 0
Abstract
The corrosion behavior of boronized Cu, Ni, and Mo-alloyed and unalloyed ductile irons in two acid solutions was investigated using the gravimetric method. Ductile irons were pack boronized at 900 and 950°C for 2, 4, 6, and 8 h. The boride-layer compounds were detected using X-ray analysis. Boronized and untreated irons were immersed in 10 wt % formic acid and 10 wt % nitric acid solutions for 14 days (336 h). Every two days, mass losses were measured, and corrosion rates were estimated using these results. The corroded surfaces were examined with scanning electron microscopy. Untreated alloyed ductile cast iron lost less mass in both acid solutions than unalloyed cast iron. Pitting is the most common type of corrosion in formic acid solution. Higher corrosion rates after 48 h of immersion decreased dramatically in 96 h for all irons due to the passivation effect of the nitric acid solution.
期刊介绍：
Protection of Metals and Physical Chemistry of Surfaces is an international peer reviewed journal that publishes articles covering all aspects of the physical chemistry of materials and interfaces in various environments. The journal covers all related problems of modern physical chemistry and materials science, including: physicochemical processes at interfaces; adsorption phenomena; complexing from molecular and supramolecular structures at the interfaces to new substances, materials and coatings; nanoscale and nanostructured materials and coatings, composed and dispersed materials; physicochemical problems of corrosion, degradation and protection; investigation methods for surface and interface systems, processes, structures, materials and coatings. No principe restrictions exist related systems, types of processes, methods of control and study. The journal welcomes conceptual, theoretical, experimental, methodological, instrumental, environmental, and all other possible studies.
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