Effect of Welding Parameter on the Corrosion Rate of Underwater Wet Welded SS400 Low Carbon Steel

E Surojo,N Muhayat,Y C N Saputro,N I Wicaksana,A R Prabowo,E P Budiana,Triyono Triyono

doi:10.3390/app10175843

E Surojo, N Muhayat + Show 5 more

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https://doi.org/10.3390/app10175843

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Journal: Applied sciences	Publication Date: Aug 24, 2020
Citations: 5	License type: CC BY 4.0

Affiliation: Sebelas Maret University, Universitas Surakarta

Abstract

This study aims to determine the effect of welding parameters on the corrosion rate of underwater wet welded SS400 low carbon steel. The underwater wet welding process was conducted using shielded metal arc welding (SMAW). Three welding electrodes, i.e., E7016, RB26 and RD26, were used in underwater wet welding performed with water depth variations 2.5 m, 5 m and 10 m. Welding current in the experiment was set to be 100 A and 110 A. After the welding stage, corrosion test was carried out on each joint in a 3.5%-NaCl solution using three-electrode polarization resistance methods. Corrosion testing results indicated that the lowest corrosion rate was found in underwater welding with current parameters of 100 A, 2.5-m depth and RB26 electrodes. The highest corrosion rate is obtained with the setting of underwater welding of 110-A current, 10-m depth and E7016 electrodes.

Highlights

Welding is a metal joining process which has a crucial role in the manufacturing industry.This process applies heat on the joined metals, so they are melted, fused and joined
This work aims to evaluate the effects of weld current, type of electrode and depth of water on the corrosion rate of underwater welded steel
NaCl solution and This produced a TafelPotentiodynamic diagram to showpolarization the corrosion rate was of SS400 steel welded specimens

Summary

Introduction

Welding is a metal joining process which has a crucial role in the manufacturing industry. This process applies heat on the joined metals, so they are melted, fused and joined. This process usually requires a filler metal and sometimes requires pressure to help the joining process of metals [1,2]. Underwater welding is needed, even recently, underwater welding is widely used for maintenance and repairing the damage of underwater structures and underwater pipelines to extend the lifetime of these facilities [3]. Underwater welding has been applied to the maintaining of nuclear power equipment. Water is a moderator and cooler in a nuclear reactor

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