The primary corrosiveness of crude oils and destructions of metals

Open journal of physical chemistry Pub Date : 2019-12-31 DOI:10.30538/psrp-ojc2019.0011

S. Aluvihara, J. Premachandra

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Abstract

Abstract: Metals play predominant prefaces regarding most of industrial components such as the crude oil refining industry although corrosion performed some banes. In the current research it was expected to investigate to compare the effect of corrosive properties of two different crude oils on the rates of corrosion in seven different types of ferrous metals. The contents of sulfur, mercaptans, organic acids, salt in both crude oils and chemical compositions of ferrous metals were determined by standard methods and instruments. A batch of similar sized metal coupons was prepared and immersed in both crude oils separately. The corrosion rate of each metal coupon was determined by the weight loss method in order to after 15, 30 and 45 days while observing the corroded metal surfaces by the optical microscope. The decayed concentrations of copper and ferrous in each crude oil sample were tested and the both initial and final hardness of each metal coupon were tested. According to the results there were observed lower corrosion rates from stainless steels, relatively higher impact from salts on the corrosion, formation corrosion compounds, corrosion cracks, pitting corrosion on metal surfaces and there were observed a slight reduction of hardness in each metal coupon eventually.

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原油的初级腐蚀性和金属的破坏性

摘要:金属在原油炼制等大多数工业部件中起着主导作用，尽管腐蚀也有一些危害。在目前的研究中，预计将调查比较两种不同原油的腐蚀性对七种不同类型黑色金属腐蚀速率的影响。用标准的方法和仪器测定了原油中硫、硫醇、有机酸、盐和黑色金属化学成分的含量。制备了一批大小相近的金属薄片，分别浸入两种原油中。在15、30、45天后，通过光学显微镜观察腐蚀金属表面，用失重法测定各金属片的腐蚀速率。测定了各原油试样中铜、铁的衰变浓度，测定了各金属试样的初、终硬度。结果表明，不锈钢的腐蚀速率较低，盐对腐蚀的影响相对较大，形成腐蚀化合物，腐蚀裂纹，金属表面的点蚀，最终观察到每种金属的硬度略有降低。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Open journal of physical chemistry

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