Acid-mist Ventilation and Spill Response in the Etch Shop
蚀刻车间的酸雾通风与溅洒处置
标签：酸雾, 通风柜, 中和处置, 职业健康
三氯化铁加热到 40 ℃ 以上会释放含 HCl 的酸雾，长期吸入腐蚀呼吸道并锈蚀室内所有钢件。通风标准：蚀刻槽置于侧吸式通风柜内，面风速不低于 0.5 m/s，排风经碱液洗涤塔或至少经水幕后再排放；蚀刻槽加盖可减少雾气约 60%。溅洒处置：少量 FeCl3 溅液用碳酸氢钠干粉覆盖中和后湿布收抹（FeCl3 虽非强酸，染色与刺激性强）；强酸溅洒先覆干碱粉，绝不可直接冲水。皮肤接触立即流水冲 15 min；FeCl3 入眼须冲洗后就医。
Above 40 °C, ferric chloride releases HCl-bearing mist that corrodes airways and every steel item in the room. Ventilation: run the tank inside a side-draught hood with face velocity ≥0.5 m/s, exhausting through an alkali scrubber or at least a water curtain; a tank lid cuts mist about 60%. Spills: smother small FeCl3 splashes with dry sodium bicarbonate and wipe off wet (not a strong acid, but staining and irritant); for stronger acids, dry powder first—never water straight on. Skin contact means 15 min of running water; FeCl3 in the eye—flush and see a doctor.