黑化 meaning in English
black-oxide
blackening
chemography
melanism
melanization
Examples
- Quartz sand need three to four years to darkened completely
石英砂完全黑化需要3 4年的时间。 - The specific surface area of darkened sand was nearly 20 times than that of new quartz sand
石英砂黑化后,比表面积比原来增大20倍左右。 - Optics and optical instruments . veiling glare of image - forming systems . definitions and methods of measurement
光学和光学仪器.成像系统的黑化闪光.定义和测量方法 - Results indicated that mn , fe , al were the main elements consisting in the darkened coating of the sand media
研究表明：石英砂滤料表面的黑化物质主要是锰、铁、铝等金属元素富集的结果。 - Adding cation or anion to source water had bad effect on the adsorption of these three kinds of heavy metal , but not evident
向原水中添加阴离子或阳离子都会影响黑化砂对三种重金属的吸附,但影响不大。