基于含铬处理对环境影响的考虑，世界范围内都在积极开发有效的替代技术，用于铝合金腐蚀保护从而代替铬酸盐转化处理。
Environmental concerns relating to chromate -containing treatment employed for the protection aluminum alloys from corrosion have led to an intensive search for their replacement in the world.
高铬油管是一种耐腐蚀合金，用于井筒条件或储层流体产生腐蚀性环境的情况，这种腐蚀性环境是常规油管不能安全地耐受的。
Chrome tubing is classified as a corrosion-resistant alloy and is used where the wellbore conditions or reservoir fluid create a corrosive environment that conventional tubing cannot safely withstand.
目的：探讨空气环境对多次铸造的钴铬合金机械性能的影响。
Objective: To investigate the effect of recasting on physical properties of a cobalt-chromium alloy in air environment.
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