Fabrication of Huge Tonnage High Electric Potential As-cast Magnesium Anodes for Ocean Platform

Fang Zhongxue1; Hou Juncai2; Zhang Qiumei2

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Fabrication of Huge Tonnage High Electric Potential As-cast Magnesium Anodes for Ocean Platform
Vol. 29, Issue 10, Pages: 947-949(2009)
Published： 2009 ，
DOI：

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[1]房中学,侯军才,张秋美.海洋平台用大吨位高电位铸造镁阳极的制备工艺[J].特种铸造及有色合金,2009,29(10):947-949+880.

Fang Zhongxue1, Hou Juncai2, Zhang Qiumei2. Fabrication of Huge Tonnage High Electric Potential As-cast Magnesium Anodes for Ocean Platform. [J]. Special Casting & Nonferrous Alloys 29(10):947-949(2009)
[1]房中学,侯军才,张秋美.海洋平台用大吨位高电位铸造镁阳极的制备工艺[J].特种铸造及有色合金,2009,29(10):947-949+880. DOI：

Fang Zhongxue1, Hou Juncai2, Zhang Qiumei2. Fabrication of Huge Tonnage High Electric Potential As-cast Magnesium Anodes for Ocean Platform. [J]. Special Casting & Nonferrous Alloys 29(10):947-949(2009) DOI：

摘要

针对海洋平台用大吨位高电位镁阳极熔铸过程中容易产生氧化和熔剂夹杂、缩孔、冷隔等缺陷、电化学性能不合格率高、成本高、效率低等问题

采用"粗镁直接炼制镁阳极"工艺、分层加热净化技术以及低压转注移液和漏斗控制浇注速度的方式

并合理的设计了浇注系统和模具结构

阳极无铸造缺陷

电化学性能符合ASTM标准

性能稳定。

Abstract

There exist oxide inclusions and flux inclusions

shrinkage hole

cold shut

low current efficiency and low open circuit potential

high cost

low efficiency in the melting-casting process of huge tonnage high potential as-cast magnesium anodes used for cathodic protection of drilling platform and drilling stem working in the deep ocean environment. Through adopting smelting crude magnesium directly to magnesium anode process and layered heating furnace during melt purification

controlling the pouring velocity by low pressure transferring liquid metal into distributor as well as designing rational gating-feeding system and mould structure

the sound as-cast magnesium anode was produced successfully

and the electro-chemical properties of the anode meets the ASTM standards with the stable performance.