| 摘要 |
An anode having a passive oxide film thereon and made of an iron alloy consisting essentially of at least 20 wt.% Cr, 5 to 15 wt.% Ni, 1 to 2 wt.% Si, 0.9 to 1.5 wt.% Mn and 0.1 to 0.3 wt.% C with the balance consisting of iron and unavoidable impurities is used for reproducing an image by electrocoagulation of a colloid. Such an anode can be thoroughly cleaned without undergoing abrasion and/or pitting during cleaning. The alloy composition does not adversely affect passivation.
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