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导致无缝脚手架点腐蚀的材料因素分析

发布时间:2019-04-28人气:12
福州脚手架市场将震荡偏稳运行整体成交略有…脚手架福州脚手架价格暂稳运行。市场方面:据市场反馈情况看,周内价格暂稳运行,整体成交略有释放。据了解,周初受到黑色期货盘面震荡上调影响,福州脚手架厂家报价仍旧平稳。受 闽南地区价格小幅下调影响,福州地区贸易表示当前资源不多,暂不调整价格。库存情况看,本周福州库存小幅下降,整体维持低库存,大部分…

今天小编为各位讲解一下影响无缝脚手架点腐蚀的材料因素都有哪些。合金成分对无缝脚手架来说,0、10及F等元素是使合金具有良好抗点腐蚀性能的主要合金元素。其他一些元素也可能有一定的效果,K等元素则会降低无缝脚手架的抗点腐蚀能力。将合金元素对材料耐点腐蚀性的影响扼要地概括于有利影响是肯定的。13、0的影响是变化的。3在固溶体中是有益的,但当作为中间金属相析出时则有害,0在固溶体中是无害的,当以碳化物析出时则有害,但稍有不利影响。
Today, Xiaobian will explain to you the material factors that affect the pitting corrosion of seamless square pipes. For seamless square tubes, elements 0, 10 and F are the main alloying elements which make the alloy have good resistance to pitting corrosion. Other elements may also have some effect, while K and other elements will reduce the pitting corrosion resistance of seamless square tubes. It is affirmative that the effect of alloying elements on the pit corrosion resistance of materials can be summarized briefly in terms of beneficial effects. The effects of 13 and 0 are variable. 3 is beneficial in solid solution, but harmful when precipitated as intermediate metal phase, 0 is harmless in solid solution and harmful when precipitated with carbide, but slightly harmful. (2)对奥氏体无缝脚手架进行冷加工的研究表明,冷加工后试样表面的蚀坑数目增多和蚀坑的尺寸变小。这是因为冷加工增加位错密度,位错在表面露头处容易引起点腐蚀坑,冷加工有增加点腐蚀的趋势。
(2) The research on cold-working of austenitic seamless square tubes shows that the number of pits on the surface of samples increases and the size of pits decreases after cold-working. This is due to the increase of dislocation density in cold processing, dislocation in the surface outcrop is prone to cause pitting corrosion, cold processing has the trend of increasing pitting corrosion.

(3)表面状态对一个给定的合金环境体系,决定合金点腐蚀电位的因素乃是材料表面的光洁度。事实上,对具有不同表面光洁度的合金进行点腐蚀倾向的比较是毫无意义的。关于表面光洁度对无缝脚手架点腐蚀性能影响情况如图所示。它表明,在同样的材料环境体系中,若表面光洁度不同,其点腐蚀电位的差别可在14以上。
(3) For a given alloy environment system, the factor that determines the pitting corrosion potential of the alloy is the smoothness of the material surface. In fact, it is meaningless to compare the pitting corrosion tendency of alloys with different surface finish. The effect of surface finish on the corrosion resistance of seamless square pipes is shown in the figure. It shows that in the same material environment system, if the surface finish is different, the difference of pitting corrosion potential can be more than 14.

(4)无缝脚手架在空气中,由于加热而形成的氧化物可能对抗点腐蚀性能有重大影响。由
(4) The oxide formed by heating in seamless square tubes in air may have a significant impact on the pitting corrosion resistance. from

显微组织热镀锌脚手架对合金抗点腐蚀性能起着重要作用。各种相,如硫化物夹杂、3铁素体。相、敏化的晶界以及焊缝等都可能对钢的抗点腐蚀性能具有决定性的影响,它们都是发生点腐蚀最敏感的部位。这对显微组织较为复杂的铸造无缝脚手架以及显微组织对热处理工艺十分敏感的马氏体型无缝脚手架来说,点腐蚀与组成相的关系就更为密切。需要指出的是,含的复合硫化锰夹杂是点腐蚀更敏感的部位。因此,在冶炼无缝脚手架时,应避免采用铝脱氧剂。
Microstructure galvanized square tubes play an important role in the pitting corrosion resistance of the alloy. Various phases, such as sulphide inclusions and 3 ferrite. Phases, sensitized grain boundaries and welds may have a decisive impact on the pit corrosion resistance of steel. They are the most sensitive sites for pit corrosion. For the cast seamless square tubes with complex microstructures and martensitic seamless square tubes with sensitive microstructures to heat treatment process, the relationship between pitting corrosion and constituent phases is more close. It should be pointed out that the complex manganese sulfide inclusions are more sensitive to pitting corrosion. Therefore, aluminium deoxidizer should be avoided in the smelting of seamless square tubes.

(5)焊接所产生的氧化膜对合金在烈性氯化物溶液中的抗点腐蚀性能可能是不利的。
(5) The oxide film produced by welding may be detrimental to the pitting corrosion resistance of the alloy in the strong chloride solution.

(6)钝化处理的主要作用是溶解无缝脚手架表面的夹杂物和沾染物,使之洁净,它还可去掉表面的硫化锰夹杂,这种夹杂可能成为点腐蚀的萌生源、从而改善无缝脚手架的抗点腐蚀性能。需要注意的是,无缝脚手架在钝化处理后应用氢氧化钠溶液清洗
(6) The main function of passivation treatment is to dissolve the inclusions and contaminants on the surface of seamless square tubes and make them clean. It can also remove the manganese sulfide inclusions on the surface. Such inclusions may become the origin of pitting corrosion and thus improve the pitting corrosion resistance of seamless square tubes. It should be noted that seamless square tubes are cleaned with sodium hydroxide solution after passivation treatment.


广州脚手架价格或盘整趋弱运行市场出货趋弱…脚手架广州市场脚手架价格趋弱调整。期螺弱势震荡尾盘小幅回拉,原材料方面现昌黎普碳方坯含税出厂3590跌10。今日广州脚手架市场出货趋 弱,本周当地库存消化速度环比上周明显放缓,市场脚手架厂家迫于出货压力相继下调价格,然降价后成交依然未有明显起色。近期广东天气频繁发生强降雨部分地区甚至 严重积水淹没街道和交通,一定程… 广州脚手架骄价格或偏强拉涨运行与昨日相比…脚手架广州市场脚手架价格维稳出货为主。今日广州市场脚手架价格主流稳价为主,市场成交整体与昨日相比稍微有所增加;今日期货呈现宽幅拉涨趋势,原材料方面现昌黎普碳方坯含税出厂 3370稳。今日广州脚手架市场价格走势表现为先弱后强,中午一次开价部分资源有所松动下调;午后随着期货的大幅拉涨现货价格开始止跌回稳,成交也开始…
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