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          當前位置 -> 方管知識- 解讀不銹鋼方管到底升不生銹?怎么預防 發布時間:(2019/1/29)

        解讀不銹鋼方管到底升不生銹?怎么預防


        大多數人認為不銹鋼是絕對不會生銹的,而生銹的就不是不銹鋼了。其實,一些含鎳低的不銹鋼材質在一定的條件下也會生銹的。不銹鋼方管具有抵抗大氣氧化的能力,同時也具有在含酸、堿、鹽的介質中耐腐蝕的能力。但其抗腐蝕能力的大小是隨其鋼質本身化學組成、加互狀態、使用條件及環境介質類型而改變的。因此,不是任何一種不銹鋼,在任何環境下都能耐腐蝕不生銹。
        Most people think that stainless steel will never rust, but stainless steel will not rust. In fact, some stainless steel materials with low nickel content will rust under certain conditions. Stainless steel square tube has the ability to resist atmospheric oxidation, but also has the ability to resist corrosion in medium containing acid, alkali and salt. However, the corrosion resistance of the steel varies with its chemical composition, additive state, service conditions and the type of environmental medium. Therefore, not any stainless steel, in any environment can resist corrosion and rust.
        方管
        Square tube
        不銹鋼是靠其表面形成的一層極薄而堅固細密的穩定的富鉻氧化膜來防止氧原子滲入氧化,而獲得抗銹蝕的能力。該薄膜如果遭到破壞,不銹鋼方管就會失去抗銹能力。日常中多見的破壞方式有如下四種:
        Stainless steel is formed by a very thin, solid, compact and stable chromium-rich oxide film on its surface to prevent oxygen atoms from penetrating into oxidation, and to obtain the ability to resist corrosion. If the film is destroyed, the stainless steel square pipe will lose its rust resistance. There are four common ways of destruction in daily life:
        (一)不銹鋼方管表面粘附有機物汁液,在有水氧情況下,構成有機酸,長時間則有機酸對金屬表面的腐蝕。
        (1) The surface of stainless steel square tubes is adhered with organic juice, which forms organic acids in the presence of water and oxygen, and corrodes the metal surface for a long time.
        (二)在有污染的空氣中,遇冷凝水,形成硫酸、硝酸、醋酸液點,引起化學腐蝕。
        (2) In polluted air, when it encounters condensate water, it forms sulfuric acid, nitric acid and acetic acid liquid points, which cause chemical corrosion.
        (三)不銹鋼方管表面存積著含有其他金屬元素的粉塵或異類金屬顆粒的附著物,在潮濕的空氣中,附著物與不銹鋼間的冷凝水,將二者連成一個微電池,引發了電化學反應,保護膜受到破壞,稱之謂電化學腐蝕。
        (3) The surface of stainless steel square tubes contains dust containing other metal elements or adhesives of different metal particles. In humid air, the adhesives and the condensate water between the adhesives and stainless steel connect the two into a micro-battery, which causes electrochemical reaction and damages the protective film. It is called electrochemical corrosion.
        (四)不銹鋼方管表面粘附含有酸、堿、鹽類物質,引起局部腐蝕。
        (4) The adherence of stainless steel square tubes to the surface contains acids, alkalis and salts, which causes local corrosion. 標簽:
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