Passivation

Passivation is the process of making a material "passive" in relation to another material prior to using the materials together. For example, prior to storing hydrogen peroxide in an aluminium container, the container can be passivated by rinsing it with a dilute solution of nitric acid and peroxide alternating with deionized water. The nitric acid and peroxide oxidizes and dissolves any impurities on the inner surface of the container, and the deionized water rinses away the acid and oxidized impurities. Another typical passivation process of cleaning stainless steel tanks involves cleaning with NaOH and citric acid followed by nitric acid (up to 20 t 120F) and a complete water rinse. This process will restore the film, remove metal particles, dirt, and welding generated compounds (ex. oxides).
See more at Wikipedia.org...

n. passivation

passivation /,pæsi'veiʃn/
danh từ (kỹ thuật) sự thụ động hoá sự oxy hoá chống gỉ sự rửa bằng axit
(C) 2007 www.TừĐiểnTiếngViệt.net

PASSIVAZIONE

danh từ
(kỹ thuật) sự thụ động hoásự oxy hoá chống gỉsự rửa bằng axit