论述了氢氟酸对碳钢的腐蚀规律，并介绍了碳钢设备和碳钢氩弧焊丝的合理选材。
The regular corrosive patterns of carbon steel in hydrofluoringe acid are mentioned. The reasonable selection of carbon steel and carbon steel argon arc welding wire are introduced.
逆土酸系指氢氟酸浓度和用量高于盐酸浓度和用量的土酸，它处理地层的机理与土酸相同。
The reversed mud acid is the mud acid whose concentration and volume of hydrofluoric acid is higher than that of hydrochloric acid, its treatment mechanism is identical to the mud acid.
重点介绍直流锅炉氢氟酸酸洗的目的，方法及过程，还对不同介质的化学清洗进行了比较。
This article introduces the purpose, method and procedure of HF acid chemical clean for once through boiler, and comparison between chemical clean of different mediums is presented as well.
如果工作人员不做防护，包含氢氟酸、磷酸、氨三乙酸的玻璃和金属清洁剂会灼伤或刺激到皮肤。
Glass and metal cleaners that include hydrofluoric acid, nitrilotriacetate and phosporic acid could cause burns or irritation if staff do not use a protective barrier.
用硝酸和氢氟酸溶解试样，采用耐氢氟酸雾化装置，用ICP - AES法测定硅锰合金中的硅。
Dissolving sample with nitric acid and hydrofluoric acid, the silicon content of silicon-manganese alloy was made a measurement with ICP-AES method in the hydrofluoric acid-resistant spray devices.
试样用硝酸—氢氟酸溶解，硫酸冒烟后强碱分离钛、铁、镍离子，其余干扰离子用酒石酸钾钠掩蔽。
The sample is dissolved in nitric and fluoric-hydro acid adding sulfuric acid, and heating up to fuming, then the matrix element titanium is separated with sodium hydroxide.
通过对比试验发现：测定炭素材料中二氧化硅的含量，熔融法的分析结果比氢氟酸法更稳定、准确；
The comparative tests show that the content of silicon dioxide in carbon materials determined by the melting method (MM) is more stable and accurate than the hydrofluoric acid method (MHA);
氢氟酸(HF)为一无色略带刺激味的无机酸，普遍地被使用于各种工业，如半导体工业及金属除锈等。
Hydrofluoric acid (HF), a colorless inorganic acid with mild irritating odor, is used extensively in various industries, such as the semiconductor industry and the electropolishing of metal.
分析了输送氢氟酸的液下屏蔽泵产生故障的原因，进行了相应的改造，保证了屏蔽泵的长周期稳定运行。
The hitch of the canned-motor pump for delivering hydrofluoric acid was analyzed. The corresponding transformation was conducted in order to guarantee the pump running long period.
设计了1种新型填料—ptfe阶梯拉西环并应用在无水氢氟酸装置的洗涤塔中，分析了该填料的特性。
A new type filler, PTFE ladder Rasching ring is designed and used in the washing tower of anhydrous hydrofluoric acid equipment, properties of this filler is also analyzed.
稀土草酸盐中直接加氢氟酸置换生成氟化稀土，选择加入120%理论量的氢氟酸有较高的转化率和回收率。
The RE fluoride can be prepared directly from oxalate by adding hydrofluoric acid . The ratio of transformation and recovery is high if the hydrofluoric acid is added by 120% theoretical amounts.
以氢氟酸(HF)为催化剂，采用常压干燥法制备了二氧化硅干凝胶，分析了催化剂和干燥条件对干凝胶的影响。
The silica xerogels were synthesized by ambient pressure drying method with hydrofluoric acid (HF) as catalyzer. The influence of catalyzer and drying method on the xerogels were analyzed.
探讨了正硅酸乙酯的溶胶-凝胶过程中，氢氟酸，盐酸，氨水，硫酸和醋酸等催化剂对水解、聚合和胶凝时间的影响。
In the sol_gel process of TEOS (tetraethoxysilane), the effects of catalysts on hydrolysis reaction, condensation reaction and gelling properties were discussed.
UHMWPE对非氧化性酸（烯硫酸、硝酸及浓度较大的盐酸、磷酸、氢氟酸、甲酸、乙酸）、氨和胺及各种碱、盐溶液都有两好的耐蚀性、两种材料都不耐强氧化性酸的腐蚀。
UHMWPE has a fine corrosion resistance to inoxidable acid (dilute sulfuric acid, nitric acid and large concentration hydrochloric acid, phosphorus acid, hydrofluoric acid, and salty solutions.
UHMWPE对非氧化性酸（烯硫酸、硝酸及浓度较大的盐酸、磷酸、氢氟酸、甲酸、乙酸）、氨和胺及各种碱、盐溶液都有两好的耐蚀性、两种材料都不耐强氧化性酸的腐蚀。
UHMWPE has a fine corrosion resistance to inoxidable acid (dilute sulfuric acid, nitric acid and large concentration hydrochloric acid, phosphorus acid, hydrofluoric acid, and salty solutions.
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