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Article
Publication date: 19 August 2019

Hualiang Huang and Furong Bu

The purpose of this study is to provide a theoretical basis for the study of the galvanic corrosion mechanism of copper coupled silver-coating under a thin electrolyte layer in…

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Abstract

Purpose

The purpose of this study is to provide a theoretical basis for the study of the galvanic corrosion mechanism of copper coupled silver-coating under a thin electrolyte layer in electronic systems.

Design/methodology/approach

Electrochemical measurements and surface characterizations.

Findings

The results indicate that the potential difference between copper and silver electrodes first quickly increases, and then reaches a relatively stable and large value with the extension of the immersion time. With the significant increase in the cathode/anode area ratio in electronic systems, the area ratio effect obviously accelerates the corrosion of copper due to the remarkable promotion of the cathode process. For a large cathode/anode area ratio, the galvanic current density always maintains a large value and exhibits an increasing trend with the extension of the immersion time, which is attributed that the area ratio effect reduces the protection of corrosion products. For the same area of cathode and anode, the galvanic current density always maintains a small value with the extension of the immersion time due to a low galvanic effect and protective corrosion products.

Practical implications

This work provides some information for the establishment of reliably protective measures for electronic systems in service.

Social implications

This work not only provides some information for the establishment of reliably protective measures for electronic systems in service, but also provides a theoretical basis for the selection of metal materials in microelectronic systems.

Originality/value

This work provides not only a theoretical basis for the study of the galvanic corrosion mechanism of Cu/Ag under a thin electrolyte layer, but also provides some information for the establishment of reliably protective measures for electronic systems in service.

Details

Anti-Corrosion Methods and Materials, vol. 66 no. 6
Type: Research Article
ISSN: 0003-5599

Keywords

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Book part
Publication date: 20 July 2012

Marianne Hester

Purpose – The chapter explores transnational influences, global and local networks and organizations (governmental and nongovernmental), in the development of domestic violence…

Abstract

Purpose – The chapter explores transnational influences, global and local networks and organizations (governmental and nongovernmental), in the development of domestic violence policy in China and England.

Approach – The frameworks of traveling theory (Said, 1984; Min, 2005) and global social policy and international relations approaches to policy transfer such as policy entrepreneurs (Stone, 2001) are used to discuss the different domestic violence policy trajectories in the two countries.

Social implications – It is shown that in China, where activism and policy development concerning domestic violence is relatively recent, global social policy and transnational alliances created via international and global meetings have enabled activists to draw on ideas and policy frameworks from outside the nation-state to develop a specifically Chinese policy agenda. In England, where there is a longer history of debate and policy development regarding domestic violence, global social policy and transnational links have more recently become important to activists and academics wanting to shift policy developments further and to place them within a framework of gendered inequality and human rights.

Findings – The chapter considers action and policy development related to domestic violence, comparing these across the very different contexts of England and China by using the ideas of traveling theory and policy networks. It is shown that use by Chinese of pressure from “within” and “at the margins” of the state has proven effective in challenging and developing domestic violence policy, while in England a combination of pressure from “outside” the state and mainstreaming has enabled activists to develop the policy agenda in positive, if fragile, ways.

Originality/values of chapter – In both China and England, there is evidence of policy entrepreneurs traveling policy ideas into the countries, where they are contested and incorporated. The particular sociopolitical contexts of women's movements and networks influence policy development across the different localities. Within the Chinese context, activists have used pressure from “within” and “at the margins” of the state to effectively challenge and develop domestic violence policy. English activists have instead used pressure from “outside” the state to develop and shape domestic violence policy in England.

Details

Social Production and Reproduction at the Interface of Public and Private Spheres
Type: Book
ISBN: 978-1-78052-875-5

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