A conversion coating on carbon steel with good anti-wax performance in crude oil

作者：Wang Zhiwei; Zhu Liqun; Liu Huicong; Li Weiping^*

来源：Journal of Petroleum Science and Engineering, 2013, 112: 266-272.

DOI：10.1016/j.petrol.2013.11.013

• conversion coating
• wax deposition
• anti-wax
• wettability

Wax deposition on pipeline from crude oil is a prevalent problem that petroleum industry has always been suffered. In this paper, a conversion coating on carbon steel with good anti-wax performance was constructed to solve this problem through a simple coating and heat treatment process. The conversion coating is composed of pyrophosphate with a flower-like microstructure. After wax deposition test, the conversion coating has low wax deposition weight which is 2.9 mg/cm(2) and high wax deposition reduction rate (80% in average). The conversion coating has a special wettability which is super-oleophobic with low oil-adhesion in water (oil contact angle is 162 and rolling angle is 7) and hydrophilic in oil. The anti-wax mechanism is discussed and it may be attributed to the polar hydrophilic component and micro-structure of the conversion coating.

• 出版日期2013-12
• 单位北京航空航天大学