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精密鑄造件是如何防銹的?
來源: | 作者:hkw935742 | 發布時間: 2018-08-08 | 766 次瀏覽 | 分享到:

        金屬或合金在大氣中因為氧、水分、酸、鹽及濕潤空氣導致的腐蝕或變色稱為生銹或銹蝕,它可以使具有很高強度的金屬表層變成強度很低的化合物。為此,熔模鑄件常需進行中期防銹處置。防銹的辦法,通常選用水劑防銹或油料防銹。無論選用哪一種辦法防銹,鑄件預先都要通過洗刷,鏟除表面的污濁物,并促進其生成鈍化膜。要注意洗刷液的成分、溫度及用處。鑄件洗刷后要用熱的、枯燥的壓縮空氣吹干,隨即進行防銹處置。

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