Why Dow's 1941 Seawater Magnesium Lasted 80+ Years While Modern Magnesium Corrodes in Months
Автор: Industrial Age Archives
Загружено: 2025-12-03
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Why Dow's 1941 Seawater Magnesium Lasted 80+ Years While Modern Magnesium Corrodes in Months
In 1941, Dow Chemical opened the world's first seawater magnesium extraction plant in Freeport, Texas, producing 18,000 tons annually using a revolutionary electrochemical process. The company extracted magnesium from Gulf of Mexico seawater by pumping millions of gallons daily, treating it with lime made from oyster shells, then using massive electrolytic cells powered by cheap Texas natural gas. This seawater-derived magnesium had exceptional purity levels and grain structure that made it far more corrosion-resistant than today's magnesium produced from mined ores using the cheaper Pidgeon process developed in China. During WWII, 84% of America's magnesium came from Dow's seawater plants, and aircraft components made from this material showed remarkable longevity compared to modern magnesium alloys that deteriorate rapidly due to impurities and different crystalline structures.
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