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本工作用穆斯堡尔谱学等方法对几种钢的海水锈层进行了分析研究。主要分析了锈层的相组成。宏观观察表明以硅铬铜镍为合金元素的C—4钢内锈层比较致密,较厚、较坚硬、连成较大的板状块。而以锰钛为主要合金元素的C—2钢的内锈层较薄、不均匀、较脆,甚至有时不能连成一块。穆斯堡尔谱学、X线、红外吸收光谱、热差分析,都说明内锈层的主要组成相是针铁石(α—FeOOH),其颗粒的线度尺寸约为3×10~2。电子探针的锈层微区域成份分析表明、铬、铜、镍各元素在内锈层中都有富集。而锰元素与此相反,不但没有富集、反而有所消失。钛的富集情况不明显。根据本文研究结果,可以得出以下初步看法:①低合金钢中的少量合金成分对锈层中的物相组成没有明显的影响;②各合金元素在内锈层中富集与否可能影响内锈层的致密度及厚度,从而影响耐蚀性;③锈层中的物相有微晶而不是非晶质的。内锈层中主要组成物粒度已小到使其表现为超顺磁状态,在液氮温度显示反铁磁性状态。
This work with Mossbauer spectroscopy and other methods of several seawater rust layer analysis. The main analysis of the rust phase composition. Macroscopical observation shows that the rust layer of C-4 steel with Si-Cr-Cu as alloying element is relatively dense, thicker, harder and even larger. The manganese-titanium alloy elements as the main elements of C-2 steel rust thinner, uneven, more brittle, and sometimes can not even be connected together. Mossbauer spectroscopy, X-ray, infrared absorption spectroscopy, thermal analysis, all show that the main component of the internal rust layer is goethite (α-FeOOH), the particle size of the linear size of about 3 × 10 ~ 2. The analysis of the microscopic composition of the rust layer of the electron probe shows that the elements of chromium, copper and nickel are enriched in the rust layer. The manganese element on the contrary, not only not enrichment, but has disappeared. Titanium enrichment is not obvious. Based on the results of this study, we can draw the following preliminary observations: ① a small amount of low-alloy steel alloy composition of the rust phase composition does not have a significant effect; ② the alloying elements in the rust layer may or may not affect the internal Rust layer density and thickness, thus affecting the corrosion resistance; rust phase in the micro-crystalline rather than amorphous. The major components of the inner rust layer have been so small that they behave as superparamagnetic states and exhibit antiferromagnetic behavior at liquid nitrogen temperatures.