• Journal of the Korean Applied Science and Technology
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• v.38 no.1
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• pp.19-28
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• 2021

Corrosion is the degradation of metals by reaction with the environment. It is difficult to completely remove. Corrosion proceeds rapidly after the protective barrier is destroyed, and several reactions occur that alter the composition and properties of the metal surface and local environments, such as diffusion of metal cations into the matrix, the formation of oxides, and local pH changes. The study of corrosion of steel and iron is of theoretical and practical interest and is receiving considerable attention. Acid solutions, which are widely used in industrial pickling, acid descaling, cleaning and acidification of oil wells, require the use of corrosion inhibitors to suppress corrosion attacks on metallic materials. Physical removal of rust requires expensive special equipment, and chemical removal of it can cause corrosion or shorten the life of the metal. In this study, an eco-friendly rust cleaner was developed using cosmetics and food materials by applying the concept of perm reducing agent and chelate, and applied to remove rust from industrial and hot water pipes and various industrial devices. As a result, it was found that rust cleaners remove rust more effectively and safely compared to conventional treatment methods. At the same time, the rust removal efficiency was 1.75 to 2.5 times better for industrial piping and 1.56 to 2.2 times better for boiler hot water than conventional methods.

• Proceedings of the Korean Institute of Industrial Safety Conference
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• 2000.06a
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• pp.130-135
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• 2000

유기용제는 상온, 상압 하에서 휘발성이 있는 액체로서 다른 성분을 녹이는 성질이 있으며, 사용목적에 따라 단일 용제가 사용되나 대부분은 2종이상의 혼합용제 형태로 도장, 인쇄, 접착, 세정작업등 제조업뿐만 아니라 건설, 운수, 서비스업에 이르기까지 광범위하게 사용됨으로써 이를 사용하는 근로자에게 건강장애를 일으키기 쉽다. 사업장에서 사용되는 용제의 77%가 혼합용제이고 특히 도료에서의 혼합유기용제 사용비율은 93%, 신나 85%, 잉크 73%, 접착제 67%이며 세정제에는 단일 용제가 많이 사용되는 것으로 보고 되고있다. 유기용제 사용에 의한 건강장애를 예방하기 위해서는 유기용제의 사용실태 파악과 정확한 작업환경측정 및 평가를 통한 작업환경관리가 매우 중요하다고 생각 할 수 있다. (중략)