Paint & Coatings Industry >

2024 , Vol. 54 >Issue 10: 60 - 67

DOI: https://doi.org/10.12020/j.issn.0253-4312.2024-088

Application & Research

Effect of stainless steel surface treatment technologies on coating protection performance in ballast tank of duplex stainless steel chemical tankers

  • ZENG D F ,
  • YAN L Y ,
  • WU P ,
  • et al
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  • 1. Xiamen Branch of Luoyang Ship Material Research Institute，Xiamen，Fujian 361106，China；

    2. DNV China Company Limited，Shanghai 200219，China；

    3. Hudong Zhonghua Shipbuilding（Group）Co.，Ltd.，Shanghai 200219，China

Online published: 2024-10-01

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Abstract

The surface state difference of 2205 duplex stainless steel after brown corundum sandblasting，cast steel sandblasting，and cast steel sandblasting followed by brown corundum sand sweeping was characterized by scanning energy spectrum method and polarization curve method. The simulated ballast tank test was carried out to test the anticorrosive properties of the coating which was applied on the duplex stainless steel outerwall of the liquid tank of the chemical tanker after the three sandblasting processes. The corrosion creep and cathodic disbonding results of the protective coating on the ballast tank ofB-class marine steel，duplex stainless steel and welding of B-class marine steel and duplexstainless steel substrates were obtained. The results showed that abrasive residue could be formed on the surface of duplex stainless steel substrate by three sandblasting processes；The abrasive residue of steel sand made the corrosion potential of duplex stainless steel shiftnegatively，and the corrosion resistance deteriorates；In the case of cathodic protection，the steel sand abrasive residue on the surface of duplex stainless steel could reduce the cathodicdisbonding resistance of the coating due to small anode effect. In the seawater，the failure of protective coating which was applied on the duplex stainless steel welding by B-class marinesteel tended to accelerate due to the galvanic corrosion.

Key words： duplex stainless steel; ballast tank of chemical tanker; surface treatment; coating; sandblast; energy spectroscopy; polarization curve

Cite this article

ZENG D F , YAN L Y , WU P , et al . Effect of stainless steel surface treatment technologies on coating protection performance in ballast tank of duplex stainless steel chemical tankers[J]. Paint & Coatings Industry, 2024 , 54(10) : 60 -67 . DOI: 10.12020/j.issn.0253-4312.2024-088

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