Lakey Beach has potential that is not shared by many other tourist attractions such as left-hand wave sweeping. Not only that, the life of the local people around Lakey Beach tourist attraction which is quite unique and still preserves customs is a special attraction for tourists who visit. For this reason, we want to know the Characteristics, Motivation of foreign tourists visiting Lakey Beach.The sampling technique uses the slovin formula and purposive sampling by distributing 100 open questionnaires to foreign tourists visiting Lakey Beach tourist attractions. The data analysis technique used in this research is descriptive qualitative is a technique that describes and interprets the meaning of the data that has been collected. Based on the results of research characteristics of foreign tourists visiting Lakey Beach based on age 15-30 years old 57 people (57%), the area of origin of Australia 41 people (41%), male gender 5 people (56%), the status of recreational trips / holidays 98 people (98%), sources of friends / family information 54 people (54%), frequency of visiting 63 people (63%), home stay accommodations 59 people (59%). While the intrinsic motivation of foreign tourists on the indicator want to have fun score of 4.2 (agree), want to channel the hobby of surfing / surfing the score of 4.09 (agree) has the highest liker score, while the lowest liker score on the indicator wants to visit friends / liker's family score 2.15 (disagree). Whereas the extrinsic motivation of foreign tourists on the highest liker score indicator is the leisure time score of 4.27 liker (strongly agree), while the indicator with the lowest liker score is conducting a comparative study of liker score 2.16 (disagree).
API 5L Grade B steel pipe used for the oil and gas industries must meet toughness requirement of higher than 27 Joule and hardness value of lower than 248 HV. The welding process during piping installation sometimes generates lower toughness. Thus additional heat treatment was necessary to recover their superior toughness. Quenching from 900 °C into water or oil medium followed by tempering at 550 °C, 600 °C and 650 °C for 1 hour was selected in this study. Charpy impact test was used to access their toughness data, while the hardness was measured using micro Vickers hardness. It was found that the highest toughness of 168 Joule with a hardness of 166 HV1.0 was generated in the welding zone after water quenching followed by tempering at 600 °C treatment. The metallographic investigation reveals fully martensite tempered microstructures. These acquired toughness and hardness values were in accordance with API 5L pipe standard requirements.
Corrosion at the bilge due to direct contact with the seawater is an issue which is necessary to be taken into account. The problem can be solved by giving combined protection such as coating and cathodic protection impressed current cathodic protection (ICCP). For broader range, there is occasionally a possibility of over-protection at certain area especially that is close to anodes. It can trigger cathodic disbondment to occur. Cathodic disbondment is a situation when the coating loses its adhesion to the steel due to the voltage originated from cathodic protection. This trial was conducted by using several samples of LR Grade A plate coated by primer coat epoxy and top coat polyurethane. The plate was then given artificial defect with the size of R2, R3 and R4 accoring to ISO 4628-3 or is equal to 0,5% ; 1% and 8% of the plate surface width. Futhermore, impressed current cathodic protection was conducted with the steel anode, Ag/AgCl reference electrode and over-protection voltage were-1,5 ; -2,0 ; -2,5 ; -3,0 ; -3,5 and-4,0 volt. Electrolyte media employed was seawater. Furthermore, the disbondment taken place was measured after 6 hours and analyzed the corrosion product produced. In the research, it could be seen that the broader the defect was, the smaller the disbondment area was. The width of disbondment area was depending on current density. The smaller the voltage (volt) was, the broader the disbondment in accordance with the increase of disbondment width taking place on the plate surface. The corrosion product produced was Fe3O4 (Magnetite).
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