• Improper welding of X80 pipeline may cause cracks
• Brief introduction of API X52 pipeline steel
• The difference between PSL1 and PSL2
• Harm of inclusions in X70 pipeline steel
• API 5L pipeline pipe
• X52 steel plate surface quality standards that need to be met
• The basic production process of API 5L X60 pipeline steel
• The key to Q460D steel welding process
• What does the heat treatment of Q690 Steel include?
• Reasons for choosing Q690D steel

Performance characteristics of DNV GL grade B marine steel plate shop primer - 1

The function of shop primer is to protect the DNV GL grade B marine steel plate surface treated by shot blasting, so as to prevent the corrosion damage caused by steel rust during processing and ship construction. The shop primer of DNV GL grade B marine steel plate is different from the common coating and shall have the following characteristics.

1. Shop primer of is a kind of temporary maintenance primer, which can prevent DNV GL grade B marine steel plate from rusting to a certain extent. The maintenance period depends on the type selected and the environment, generally 3-9 months.The shop primer for long-term contact with seawater shall be suitable for the unsaponifiable performance of cathodic protection.

2. In order to meet the needs of automatic assembly line operation, the paint film should be dried within 3-5min. Generally, under the heating condition, the surface temperature of DNV GL grade B marine steel plate is 40 ℃, and the shop primer shall be dried within 3 minutes so as to move on the raceway and not damage the paint film when lifting.