Product Dose
- 8774493 reads
The establishment of protective metal oxide lay-ers through the use of reducing agents (such as hydrazine, hydroquinone, and other oxygen scavengers) is known as metal passivation or metal conditioning. Although "metal passivation" refers to the direct reaction of the compound with the metal oxide and "metal conditioning" more broadly refers to the promotion of a protective surface, the two terms are frequently used interchangeably.
The reaction of hydrazine and hydroquinone, which leads to the passivation of iron-based metals, proceeds according to the following reactions:
N2H4 | + | 6Fe2O3 | ® | 4Fe3O4 | + | 2H2O | + | N2 |
hydrazine | hematite | magnetite | water | nitrogen |
C6H4(OH)2 | + | 3Fe2O3 | ® | 2Fe3O4 | + | C6H4O2 | + | H2O |
hydroquinone | hematite | magnetite | benzoquinone | water |
Similar reactions occur with copper-based metals:
N2H4 | + | 4CuO | ® | 2Cu2O | + | 2H2O | + | N2 |
hydrazine | cupric oxide | cuprous oxide | water | nitrogen |
C6H6O2 | + | 2CuO | ® | Cu2O | + | C6H4O2 | + | H2O |
hydroquinone | cupric oxide | cuprous oxide | benzoquinone | water |
Magnetite and cuprous oxide form protective films on the metal surface. Because these oxides are formed under reducing conditions, removal of the dissolved oxygen from boiler feedwater and condensate promotes their formation. The effective application of oxygen scavengers indirectly leads to passivated metal surfaces and less metal oxide transport to the boiler whether or not the scavenger reacts directly with the metal surface.
RX MARINE INTERNATIONAL is most popular chemicals source in INDIA, Keeping ready stock at 5 LOCATION which includes Mumbai, Kandla - Gandhidham, Vizag - Visakhapatnam, Ennore - Chennai, Kolkata more then 3000 types of chemicals. Please click here to get PRODUCT Categories details http://rxmarine.com/Products
Mail Us for any PRODUCT related information and purchase inquiry : rxmarinechemical@gmail.com ( This mail is for customer / Buyer only ) And if you wants to add your hand as a supplier, And if you have volume manufacturing capacity of chemicals, pl. drop your mail at rxmarinechemical@gmail.com ( This mail is for supplier only )