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发表于 2008-8-5 10:29:37
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来自: 中国山东聊城
关于土壤模拟液的配置
关于土壤模拟液的配置
4 T; B9 q* Z! e& J. j土壤盐浓差宏电池对碳钢的腐蚀, z+ k: Q1 x [( g1 ~) U
采用砂土作为模拟土壤 ,通过失重法及电化学方法 ,研究了土壤盐浓差对A3钢的宏电池腐蚀的影响规律 .结果表明位于高盐土壤中的试样试验初期为宏电池阳极 ,而在第 5天发生了极性逆转 .: u3 c0 a, x) s( g: F
【作者单位】:[url=]中国科学院金属腐蚀与防护研究所金属腐蚀与防护国家重点实验室!沈阳110015(孙成[/url];[url=]李洪锡[/url];[url=]张淑泉)[/url];[url=]中国科学院金属腐蚀与防护研究所金属腐蚀与防护(高立群)[/url]
* t, k1 j: X1 I# ]. |( F* V% ~【关键词】:[url=]碳钢[/url];[url=]土壤盐浓差[/url];[url=]宏电池腐蚀[/url]3 E- E/ L* Q) f3 }
【基金】:[url=]国家自然科学基金! (5 98991 40 )[/url];[url=]国家重点基础研究专项资助! (G1 9990 6 5 0 )[/url]
: U5 D# L# n5 L/ r% s; R4 N分类号】:TG172.4
( Y/ c! Q% d/ G: I. l7 O【DOI】:cnki:ISSN:1002-6495.0.2000-02-010
/ X0 @5 [. j& a' }" ?5 ]【正文快照】:, y* ]: L0 g, \2 B+ V6 ]) X
土壤是由固、液、气三相组成的复杂体系.在固体颗粒构成的骨架内充填着各种矿物盐,如氯化物盐,钠、钾、镁的硫酸盐等.土壤中Cl-是影响土壤腐蚀性的主要因素[1,2].由于土壤种类繁多、各种土壤中Cl-差异较大,因此埋地金属构件(如钢管、铝、铅护套电缆),由于土壤中盐含量的不+ K9 L' ~1 Z9 D! i
CORROSION OF CARBON STEEL CAUSED BY SALT CONCENTRATION DIFFERENCE MACROCELL IN SOIL
+ H- ]( |0 {9 U0 s# d5 S, w( tThe effect of salt concentration difference macrocell (2.0%Cl - and 0.02%Cl -) on the corrosion of A3 steel was studied in the simulated soil of moisture sands by means of weight loss and electrochemistry methods. It was shown that the sample in the higher salt concentration soil was anode of the macrocell at begining of test, then the polarity of the macrocell was altered after 5 days of experiment. The former anode of the macrocell in the higher salt concentration soil turned to be cathode. This form of macrocell continued until the end of the experiment. |
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