Grade AH36 ship steel plate, frequently used in offshore applications, was joined underwater by shielded metal arc welding (SMAW) using two different types of electrodes (E6013 and E7014). The ship steel plate was also joined under atmospheric conditions in order to compare both joints in terms of mechanical and metallurgical properties. The E6013 rutile electrode was isolated by wrapping before use, and the underwater welding process was carried out at a depth of 8 m under the sea. The joints were first subjected to visual inspection and then liquid penetrant, ultrasonic, and radiographic tests were performed. In order to determine the mechanical properties of the joints, tensile, bending, and impact toughness tests were also carried out. In addition to the microhardness test on the weld zones, microstructural examination was also performed on the joints. As a result of the nondestructive tests, weld defects like slag remaining between the passes, gas porosities, burn-through, and lack of penetration were seen on the joints welded underwater with the two different electrodes. The study determined that these defects had significantly influenced the mechanical properties and width of the weld zone of the joints.

AH36级船用钢板通常用于海上应用，使用两种不同类型的电极（E6013和E7014）通过屏蔽金属电弧焊（SMAW）在水下连接。船用钢板也要在大气条件下进行连接，以便比较两种接头的机械和冶金性能。E6013金红石电极在使用前通过包裹将其隔离，在水下8 m的深度进行水下焊接工艺。首先对接缝进行目视检查，然后进行渗透液，超声和射线照相测试。为了确定接头的机械性能，还进行了拉伸，弯曲和冲击韧性测试。除了在焊接区进行显微硬度测试外，关节也进行了显微组织检查。作为无损检测的结果，在两个不同电极的水下焊接接头上发现了焊缝缺陷，例如道次之间残留的炉渣，气孔，烧穿和不渗透。研究确定这些缺陷对接头的机械性能和焊接区域的宽度有显着影响。