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1.发明授权Method and compositions for penetrating and removing accumulated corrosion products and deposits from metal surfaces 失效渗透和去除金属表面积累的腐蚀产物和沉积物的方法和组合物
公开(公告)号：US4789406A
公开(公告)日：1988-12-06
申请号：US145658
申请日：1988-01-13
摘要： Methods for removing iron oxide and other accumulated corrosion products from metal surfaces in contact with aqueous systems, such as cooling water systems, are disclosed. The method steps can be performed without requirement of system shutdown and without requirement of acidic conditions. The methods comprise contacting the corroded surface with an organic reductant/chelant and an inorganic reducing agent while the pH of the aqueous system is maintained within the substantially neutral range of about 6.5-7.5. Pyrogallol and methyl gallate may be used as the organic reductant/chelant.
摘要翻译： 公开了用于从与诸如冷却水系统等水系统接触的金属表面除去氧化铁和其它积累的腐蚀产物的方法。 方法步骤可以在不需要系统关闭的情况下进行，而不需要酸性条件。 所述方法包括使腐蚀表面与有机还原剂/螯合剂和无机还原剂接触，同时水系统的pH保持在约6.5-7.5的基本中性范围内。 邻苯三酚和没食子酸甲酯可用作有机还原剂/螯合剂。
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公开(公告)号：US4263092A
公开(公告)日：1981-04-21
申请号：US66952
申请日：1979-08-16
CPC分类号： C23F14/02 , D21C11/106 , Y10S159/13
摘要： A method is disclosed for inhibiting soft scale precipitation in black liquor systems by adding thereto polyacrylic acid.
摘要翻译： 公开了一种通过加入聚丙烯酸来抑制黑液体系中的软垢沉淀的方法。
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3.发明授权Polyacrylic acids and methyl vinyl ether/maleic anhydride copolymers as soft scale inhibitors 失效聚丙烯酸和甲基乙烯基醚/马来酸酐共聚物作为软垢抑制剂
公开(公告)号：US4255309A
公开(公告)日：1981-03-10
申请号：US66953
申请日：1979-08-16
CPC分类号： D21C11/106 , C02F5/10 , C08L33/02 , C08L35/08
摘要： A method is disclosed for inhibiting soft scale precipitation in black liquor systems by adding thereto a treatment comprising in combination polyacrylic acid and methyl vinyl ether/maleic anhydride copolymer.
摘要翻译： 公开了一种通过向其中加入包含组合聚丙烯酸和甲基乙烯基醚/马来酸酐共聚物的处理来抑制黑液系统中的软垢沉淀的方法。
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