The effect of some common carboxylic acids as well as sulphuric acid concentration on thickness and hardness of medium temperature anodizing film of Al alloy was investigated.
研究了一些常见的羧酸以及硫酸浓度等对铝合金中温阳极氧化膜的厚度和硬度的影响。
2
Wool is attacked by hot sulphuric acid and decomposes completely. It is generally resistant to most other mineral acids of all strengths.
羊毛会受到浓硫酸的侵袭并完全分解。羊毛一般能抵御多数其它不同浓度的无机酸。
3
A mixed nitric-sulphuricacids is used to recover the valuable metals ni, Cu and co from low-grade Ni-Cu sulfide tailings, the leaching rate of ni, Cu, and co is 91.