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湿热实验评价聚氨酯密封胶对金属的腐蚀性

  • 发布时间 : 2022-12-4 18:47:28
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(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.

湿热实验评价聚氨酯密封胶对金属的腐蚀性

(Summary description)Customized SILICONE STRUCTURAL SEALANT from China manufacturer refers to the adhesive with high strength, can bear large load, aging resistance, fatigue resistance and corrosion resistance, and has stable performance within the expected life. It is suitable for bearing the bonding of strong structural parts. Non structural adhesive has low strength and poor durability. It can only be used for bonding, sealing and fixing of ordinary and temporary properties, and cannot be used for structural adhesive bonding. NEUTRAL SILICONE WETHERPROOF SEALANT from China manufacturer is a structural adhesive with waterproof function. Silicone glue refers to the adhesive based on silicone rubber. According to different functions, it can be divided into structural adhesive, potting adhesive, sealant, thermal conductive adhesive, flame retardant adhesive and so on.

  • 发布时间 : 2022-12-4 18:47:28
  • Views:
Information

       针对变电站主变压器本体及散热器标示牌处存在严重腐蚀、渗漏油的情况,对粘贴变压器标示牌所使用的聚氨酯密封胶对变压器散热器冷轧钢板的腐蚀行为进行分析。选取酸性、中性聚氨酯密封胶作试样,浸泡实验、耐中性盐雾腐蚀实验、湿热实验、红外光谱侧试和pH值测试结果表明:酸性聚氨酯密封胶的防水、防酸、防盐渗透性比中性聚氨酯密封胶好,但酸性硅酮密封胶对金属的腐蚀性更强,其中百丽春牌酸性聚氨酯密封胶的腐蚀性最强;酸性聚氨酯密封胶在固化过程中产生腐蚀性气体,对金属造成腐蚀。建议采用中性聚氨酯密封胶或其他非腐蚀性胶粘贴变压器标示牌。

       变电站的主变压器标示牌通常使用聚氨酯密封胶粘贴,而聚氨酯密封胶对变压器本体及散热器标示牌有腐蚀作用,并造成变压器渗漏油。聚氨酯密封胶可分为酸性和中性两种,从产品包装上又可分为单组分和双组分。受施工条件的限制,只有单组分聚氨酯密封胶适用于现场施工川。随着中国经济建设的迅猛发展,对高性能弹性密封胶的需求不断增长,新型密封材料已列人国家高新技术产业化重点领域,成为国家重点支持项目,有很多学者都进行了相关方面的研究,研究内容主要集中在新型密封胶的研制,以提高密封胶的耐热性、粘接强度、相容、耐久性和降低固化温度,鲜有研究聚氨酯密封胶对金属耐蚀性的影响。本文针对两种常用品牌的酸、中性单组分聚氨酯密封胶进行腐蚀性实验,通过浸泡实验和盐雾腐蚀实验研究聚氨酯密封胶的耐介质渗透性,采用湿热实验评价聚氨酯密封胶对金属的腐蚀性,利用红外光谱分析试样并发现两种测试聚氨酯密封胶pH值的方法。www.sdyuantai.com

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