銅喉焊接工藝欠佳 導致焊料擴至內壁釋鉛
即时港闻
发布： 2015-09-25 00:06
撰文： 無綫新聞
政府成立的調查食水含鉛量超標專責小組公布初步調查結果，專責小組指食水含鉛的主因是錫焊接物料含有鉛。
成員陳漢輝表示：「為何有些銅喉管也有鉛，這張圖讓我們看到，剖切圖看到，如果我們切開一個曲尺位，我們看到如果正式焊接得好的話，鉛應該是在這條線左右，甚至不出現這條線在這些位置。在這些位置才有焊錫，但由於手工不好，錫或是鉛錫擴散到一個很大範圍。」
成員陳漢輝表示：「為何有些銅喉管也有鉛，這張圖讓我們看到，剖切圖看到，如果我們切開一個曲尺位，我們看到如果正式焊接得好的話，鉛應該是在這條線左右，甚至不出現這條線在這些位置。在這些位置才有焊錫，但由於手工不好，錫或是鉛錫擴散到一個很大範圍。」
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