| Autor: |
Katanina, Alla, Kornev, Oleg, Shuvalov, Aleksandr, Sokolova, Eugenia |
| Předmět: |
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| Zdroj: |
AIP Conference Proceedings; 2023, Vol. 2497 Issue 1, p1-10, 10p |
| Abstrakt: |
Corrosion and mechanical resistance of AW6082-T6 alloy was studied on specimens of detachable joints, modelling ones of metal structures, with zinc-coating and high-strength steel bolts. Specimen elements were made of metal sheet of 10 mm thickness. Accelerated test of joint resistance to loading in corrosion conditions was maintaining of specimens in salt fog chamber (SFC) for 90 days with subsequent joint strength determination at static tensile loading. As a result of 90 days of corrosion effect in SFC conditions imitating coastal climate on detachable joint it was established that external surface of cover plates and steel elements of fastening set degraded at higher degree. Decrease in average level of stress, at which 6082-T6 alloy sheet fractures in detachable joint with corrosion, compared to specimens without corrosion, was 13%. In absence of additional corrosion stress raisers fracture behavior of base metal along plane weakened by cylindrical hole did not change both before and after corrosion effect. Areas of selective corrosion effect on base metal were detected, these were exposed surfaces of cover plates along washer perimeter and areas of condensate spreading. Alloy composition alternation in local corrosion areas was shown. It was shown that zinc-coating for steel fastening elements in chloride-containing environment was destroyed, lost its protective properties and increased depth of corrosion degradation on aluminium alloy. Coating with zinc does not prevent corrosion of steel that is in contact with elements made of 6082-T6 alloy. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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