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以玻璃包覆FeCoSiB合金微丝为对象,研究了氢氟酸含量和反应温度对包覆层去除过程的影响,以及缓蚀剂对Fe-CoSiB芯丝的保护效果.结果表明:在反应温度为25℃的条件下,当所采用的HF质量分数从10%增加到40%时,玻璃包覆层去除速度从0.005μm.s-1提高至0.076μm.s-1;在HF质量分数为40%的条件下,当反应温度从10℃升高到45℃时,玻璃包覆层去除速度从0.033μm.s-1提高到0.234μm.s-1;反应温度为20～25℃时,用质量分数40%的氢氟酸溶液去除厚度范围为7.5～9.0μm高硼硅玻璃包覆层的最佳时间为150s;硫氰酸钠及硫氰酸钠+乌洛托品作为缓蚀剂均可显著抑制氢氟酸溶液对芯丝的腐蚀,硫氰酸钠+乌洛托品还可有效减少金属吸氢,有利于防止芯丝力学性能的劣化.
The effect of hydrofluoric acid content and reaction temperature on the coating removal process and the protective effect of corrosion inhibitor on the core of Fe-CoSiB were studied by using glass-coated FeCoSiB alloy microfilament.The results show that when the reaction temperature is 25 ℃, the removal rate of glass coating increased from 0.005μm · s-1 to 0.076μm · s-1 when the mass fraction of HF used increased from 10% to 40%; when the mass fraction of HF was 40% , The removal rate of the glass coating increased from 0.033μm.s-1 to 0.234μm.s-1 when the reaction temperature increased from 10 ℃ to 45 ℃. When the reaction temperature was from 20 ℃ to 25 ℃, Fraction 40% hydrofluoric acid solution to remove the thickness range of 7.5 ~ 9.0μm high borosilicate glass coating the best time for 150s; sodium thiocyanate and sodium thiocyanate + urotropin as a corrosion inhibitor Hydrofluoric acid can significantly inhibit the corrosion of the core wire, sodium thiocyanate + urotropin can also effectively reduce the hydrogen metal, help prevent the deterioration of the mechanical properties of the core wire.