Mechanically Assisted Corrosion

McCafferty, E.

doi:10.1007/978-1-4419-0455-3_11

Cited by 3 publications

(4 citation statements)

References 44 publications

(78 reference statements)

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“…In addition to the stress, another factor that causes SCC is the combination of metals or alloys in certain corrosive environments. Typically, metals or alloys which have good corrosion resistance in general are prone to SCC in certain environments, such as stainless steel and aluminium in environments that contain chloride and titanium in seawater (Costa, 2001; McCafferty, 2010). Wanhill (2013) discussed the evidence of SCC in six antique silver items analysing the microstructural mechanisms of brittleness and fractures.…”

Section: Introductionmentioning

confidence: 99%

“…Silver has greater resistance to corrosion than copper because it has greater electrochemical potential (+0.80 and +0.34 V, respectively), that is, in relation to the silver, copper has a greater tendency to lose electrons and oxidize. The physical contact between two dissimilar metals, the alloy containing higher amounts of element with higher electrochemical potential is preserved (Figueiredo et al , 2014; McCafferty, 2010).…”

Section: Introductionmentioning

confidence: 99%

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The use of rapid prototyping in the joining of fractured historical silver object

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Figueiredo

et al. 2018

RPJ

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Purpose This paper aims to present a proposal for the restoration of a silver crown by means of fitting pieces produced by the process of 3D modelling and rapid prototyping. It also analyses the benefits of this procedure in restoration of objects weakened by corrosive processes. Design/methodology/approach Elemental chemical analysis was carried out in the alloy used in the manufacture of the crown and the constructive and corrosive processes present were studied. Three fitting pieces were modelled and prototyped in wax casting by the stereolithography apparatus system aiming to restore the part and protect the original metal against impacts and external tensions which could speed up some deterioration processes. Findings The procedure presented in this paper has shown that formal and dimensional accuracy, only achieved by means of 3D technologies, made the restoration and mechanical stability of the crown possible without the use of adhesives or welding. Originality/value The proposed procedure is a new restoration alternative which causes minimal impact to the object and abides by the main standards for modern conservation. It is made with metal which is compatible with the original piece, retractable and easily identifiable.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The use of rapid prototyping in the joining of fractured historical silver object

Seixas

Assis

Figueiredo

et al. 2018

RPJ

View full text Add to dashboard Cite

show abstract

“…A corrosão-erosão acelera a corrosão por dispersão dos mecanismos que protegem os metais em contato estático ou em movimento lento, em um ambiente aquoso. Como o nome implica, um aspecto do efeito é a retirada de metal e óxidos que estão na superfície do material, que interfere na formação da camada passiva, muitas vezes responsáveis pela proteção contra corrosão (MCCAFFERTY, 2010). A indústria prefere a utilização do aço carbono e de baixa liga, os quais estão disponíveis em grandes volumes e satisfazem os requerimentos mecânicos, estruturais, de fabricação e de custos.…”

Section: Introduçâounclassified

“…O movimento relativo também tende a varrer a camada limite do líquido presente na interface metal/líquido. Isso estimula ainda mais a corrosão por meio da dispersão de polarização de concentração, especialmente para a reação de redução de oxigênio (MCCAFFERTY, 2010). Devido à impossibilidade de uma manutenção preventiva, esses tipos de incidentes afetam diretamente na segurança e produção de unidades de exploração de petróleo.…”

Section: Introduçâounclassified