International Journal of Naval Architecture and Ocean Engineering

The Society of Naval Architects of Korea (대한조선학회)
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Methodological approach of evaluation on prefabrication primers for steel structures

  • Chung, Sung-Wook (Industrial Application R&D Institute, Daewoo Shipbuilding & Marine Engineering Co., Ltd) ;
  • Hyun, Jeong-Hun (Industrial Application R&D Institute, Daewoo Shipbuilding & Marine Engineering Co., Ltd)
  • Received : 2020.08.15
  • Accepted : 2021.09.11
  • Published : 2021.11.30
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Abstract

To the date, shipbuilding companies have applied shop primer coating which protects the steel surface from global oxidization in environment. Proper shop primer requires either anti-corrosion ability during construction or anti-porosity ability during welding, and those properties contradict to each other. This report tried to derive an optimizing parameter on these conflicting properties to select a proper shop primer. First, sufficient amounts of the natural salt spray tests were carried out to achieve a series of data for the anti-corrosion ability. Second, lots of T-joint fillet welding test were performed to evaluate the trapped porosity formed in the weld pool. According to the experimental data, we could achieve either the rust-formation rate or the porosity-formation rate, then, each rate was generalized as formulae. Then, we tried to combine these conflicting properties to decide an optimum shop primer.

Keywords

Acknowledgement

This study is supported by the project "Development of 550 MPa grade Riser Pipe for Marine Structure" (No 20010502) supported by the Ministry of Trade, Industry & Energy in the Republic of Korea.

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