S.H. Wang
金属学报(英文版)
The conversion coating was formed by dipping
AA6061 in a fluorotitanate/zirconate acid and amino trimethylene
phosphonic acid (ATMP) solution at room temperature. The formation
process and the anti-corrosion performance of the conversion coating
were investigated using electrochemical test and salt spray test
(SST), respectively. The electrochemical test shows that the Zr/Ti
and ATMP coating improves the corrosion resistance of AA6061 as good
as the chromate (VI) coating. But the results of SST show that the
corrosion resistance of Zr/Ti and ATMP coating is not as good as the
chromate (VI) coating. The corrosion area is less than 2% after
72h.
关键词:
Corrosion resistance
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null
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null
S.H. Wang
,
C.S. Liu
,
F.J.Shan
,
G.C. Qi
金属学报(英文版)
The amino-tri-(methylenephosphonic acid) layers were adsorbed on the surface of AA6061 aluminum alloy for improving the lacquer adhesion and corrosion inhibition as a substitute for chromate coatings. The surface structure and characteristic of the amino-tri-(methylenephosphonic acid) layers on AA6061 aluminum alloy were investigated by means of XPS and ATR-FTIR analysis. The analyzed results showed that the amino-tri-(methylenephosphonic acid) adsorption layers adsorb on the surface of aluminium alloy $via$ acid-base interaction in a bi-dentate conformation. After the amino-tri-(methylenephosphonic acid) layers were coated with epoxy resin, the layers showed good adhesive strength and favorable corrosion resistance in contrast to
chromate coatings.
关键词:
Amino-tri-(methylenephosphonic acid)Layer
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null
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null
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null
张清
,
李全安
,
文九巴
,
白真权
腐蚀学报（英文）
1974-），男，硕士研究生，研究方向为腐蚀与防护.〖ZK)〗
Tel：0379-4231846〓E-mail：FQ)〗〖HT〗〖HJ〗〖HT5”SS〗
〖JZ(〗〖HT2H〗〖STHZ〗〖WTHZ〗
采用高温高压釜，辅以失重法和扫描电镜，对不同H2S分压下(1.4 kPa,20 kPa,60 kPa,120 kPa)油管钢N80、P110的CO2/H2S腐蚀进行了研究.结果表明，在试验H2S分压范围内，随着H2S分压的升高，两种钢的腐蚀速率先增后降，且都在H2S分压为20 kPa时取得最大值.
关键词:
H2S分压
,
null
,
null
,
null
张清
,
李全安
,
文九巴
,
白真权
腐蚀学报（英文）
doi:10.3969/j.issn.1002-6495.2004.06.015
采用高温高压釜,辅以失重法和扫描电镜,对不同H2S分压下(1.4 kPa,20 kPa,60 kPa,120kPa)油管钢N80、P110的CO2/H2S腐蚀进行了研究.结果表明,在试验H2S分压范围内,随着H2S分压的升高,两种钢的腐蚀速率先增后降,且都在H2S分压为20 kPa时取得最大值.
关键词:
H2S分压
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N80钢
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P110钢
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CO2/H2S腐蚀速率
郭金彪
,
李艳
材料保护
目前有关HCl-H2S-H2O体系中HCl与H2S对碳钢腐蚀的交互作用的试验数据较少.利用电化学方法测试了20碳钢在90℃,不同浓度的HCl,H2S单一腐蚀液及HCl和H2S混合腐蚀液中的腐蚀速率,分析了HCl-H2S-H2O体系中HCl与H2S对20碳钢腐蚀的交互作用.结果表明:20碳钢在单一的HCl或H2S腐蚀液中的腐蚀速率随HCl或H2S浓度的增大而增大;在HCl-H2S-H2O体系中,不论H2S浓度高低,HCl的存在均会促进H2S对20碳钢的腐蚀;只有当HCl的浓度较低(≤248.72 mg/L)时,H2S的存在才会促进HCl对20碳钢的腐蚀;而当HCl浓度较高(≥499.16 mg/L)时,H2S的存在不仅不会促进HCl对20碳钢的腐蚀,还会在一定程度上起阻碍作用.
关键词:
20碳钢
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HCl
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H2S
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腐蚀
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交互作用
Intermetallics
The sulfidation behavior of a 200 mum thick Fe-40at.%Al sheet has been investigated at temperatures between 973 K and 1273 K in H-2-H2S mixtures with H,S contents of 0.052-9.7vol%. The Fe-40Al sheet exhibited excellent sulfidation resistance at temperatures below 1073 K in all the H2S-H-2 mixtures. This may be attributed to the formation of a thin alumina film on the surface of the Fe-40Al sheet during sulfidation, identified by AES analysis. At temperatures higher than 1173 K, the Fe-40Al sheet also exhibited good sulfidation resistance in the 0.052%H2S-H-2, mixture. and there was only a slight increase in mass gain with tempe rat Lire. This compares favorably with Fe-200-11Al (in at.%) foil which was severely sulfidized even at 973 K in the 0.052% H2S-H-2 mixture, and showed markedly increased mass gain with increased H2S content and temperature. (C) 2004 Elsevier Ltd. All rights reserved.
关键词:
iron aluminides (based on FeAl);corrosion;fe-al alloys;corrosion behavior;oxidation behavior;iron aluminides;sulfur vapor;al2o3 scales;1273 k;atmospheres
