挂霜

如何防止发蓝膜层的红色挂霜

Preventing red exo-frost on bluing coating

实践证明，采用适当措施可以有效防止发蓝膜的红色挂霜。

The practice shows that proper measures can be taken to effectively prevent red exo-frost on bluing coating .

分析了发蓝膜层出现红色挂霜的原因：溶液主要成分含量过高、铁氧化物过多、发蓝槽容量小、工艺操作不当、工件多次返修等。

The causes of red exo-frost on bluing coating were analysed , which were higher content of main component in solution , more ferriferous oxide , smaller bluing tank volume , poor operation , repeated workpiece reworking , etc. .

化装成骠骑兵、太太、巫婆、丑角、狗熊的人在接待室里咳嗽几声，清清嗓子，擦干净挂了霜的面孔，然后进入人们急急忙忙地点燃蜡烛的大厅。

The hussars , fine ladies , witches , clowns , and bears , coughing and rubbing the hoar-frost off their faces , came into the hall , where they were hurriedly lighting candles .

她的脸上大概又擦了粉，被灯光照得显出点灰绿色，像黑枯了的树叶上挂着层霜。

She seemed to have powdered her face again and the lamplight gave it a grey-green tinge , rather like a black withered leaf covered with frost .