Hydrofluoric Acid - an overview | ScienceDirect Topics
Hydrofluoric acid (HFA) is the inorganic acid of elemental fluorine. HFA is used in fluorocarbons, fluoropolymers, aluminum production, stainless steel pickling, uranium processing, glass etching, oil well acidizing, gasoline production, removal of sand and scale from foundry castings, and as a laboratory reagent.
Hydrofluoric Acid - an overview | ScienceDirect Topics
Hydrofluoric acid (HF) is the most effective mineral acid for breaking up strong Si–O bonds to form SiF 6 − 2 ions in acidic solution. Silicates are converted to volatile SiF 4 , which will be lost in open vessel digestion procedures.
Hydrofluoric Acid - an overview | ScienceDirect Topics
Aqueous hydrofluoric acid can be freed from lead by adding 1 mL of 10% strontium chloride per 100 mL of acid, lead being co-precipitated as lead fluoride with the strontium fluoride. If the hydrofluoric acid is decanted from the precipitate and the process repeated, the final lead content in the acid is less than 0.003 ppm.
Hydrofluoric Acid - an overview | ScienceDirect Topics
Hydrofluoric Acid. Hydrofluoric acid is a corrosive that is commonly used in industrial applications and computer processing. It is used as a cleaning agent in the petroleum industry, in the production of high-octane fuel, glass etching, germicides, dyes, tanning, and fireproofing material, as well as in rust removal.
Hydrofluoric Acid - an overview | ScienceDirect Topics
Hydrofluoric acid (HFA) is the inorganic acid of elemental fluorine. HFA is used in fluorocarbons, fluoropolymers, aluminum production, stainless steel pickling, uranium processing, glass etching, oil well acidizing, gasoline production, removal of sand and scale from foundry castings, and as a laboratory reagent.
Hydrofluoric Acid - an overview | ScienceDirect Topics
Hydrofluoric acid (HF) is a dangerous inorganic acid that is used widely in the chemical industries, electronics manufacturing, glass etching, smelting, cleaning, and other industrial fields [1–3]. It exists in two forms: in a purified form (>99%), called anhydrous hydrofluoric acid, and in a dilute form, called aqueous hydrofluoric acid [4] .
Precisely sensing hydrofluoric acid by photonic crystal hydrogels ...
2023年3月15日 · It is a great challenge to detect hydrofluoric acid (HF) with high precision, good selectivity, and visual readouts characteristics. Herein, a new photonic crystal (PC) hydrogel HF sensor based on the “selective etching-induced swelling” mechanism has been developed.
Optimizing the recovery process of ceramic grade calcium fluoride …
2022年1月20日 · Nevertheless, hydrofluoric acid with a concentration of ∼2.0 g/L (0.1 M) was the only fluoride source in the study of Yin et al. (2016), implying that CaF 2 could be recovered without a purification step to remove silicon dioxide impurities.
A review of treatment strategies for hydrofluoric acid burns: …
2014年12月1日 · Hydrofluoric acid (HF), a dangerous inorganic acid, can cause severe corrosive effects and systemic toxicity. HF enters the human body via where it contacts, such as skin and mucosa, alimentary and respiratory tracts, and ocular surfaces. In the recent years, the incidence of HF burn has tended to increase over time.
Enhanced electromagnetic wave absorption performance of Ta₄C₃T
In this study, hydrofluoric acid etching was used to obtain Ta 4 C 3 Tx MXenes with varying interlayer spaces by adjusting the etching duration, which enhanced the EMW absorption performance. The impact of interlayer spacing on the EMW absorption performance of Ta 4 C 3 T x MXene was systematically evaluated for the first time.