Sandblasting and rust removal technology for steel structures, guardrails, and pipelines of offshore platforms

Sandblasting and rust removal of offshore platforms, cleaning up old paint corrosion and rust spots on guardrail fences, pipes, steel structures, etc.!

1. It is characterized by including the following steps:

Step 1. Select high-quality copper ore and strictly require the particle size of copper ore to ensure that the particle size of copper ore is 8-20 mesh. Requirements are required in terms of shape, hardness, and moisture content to ensure that the full ocean platform is sandblasted. Claim;

Step 2. Control the blasting air pressure to 0.4~0.6MPa, and ensure that the compressed air is clean and dry;

Step 3. Choose suitable climatic conditions, use thermometers, hygrometers and other testing tools to measure to ensure that the ambient temperature during construction is 25 ~ 40C, and the relative air humidity is ≤85%;

Step 4. Strictly control the operation process during sandblasting. The angle between the abrasive jetting direction and the workpiece is 75-85°. When the nozzle diameter increases: 20%, the nozzle should be replaced.

2. The method for removing rust by sandblasting on an offshore platform according to claim 1, wherein in step 1, it is ensured that the particle size of the copper ore is 10-18 mesh.

3. The method for removing rust from sandblasting on an offshore platform according to claim 1, wherein the air pressure of sandblasting is controlled to be 0.5MPa in step 2.

4. The method for sandblasting and rust removal of an offshore platform according to claim 1, wherein the distance between the spray gun and the working surface in step 4 is 200-400 mm.

5. An offshore platform sandblasting and derusting, prepared by the offshore platform sandblasting and rust removal method of any one of claims 1-4.

Technical Field-Sandblasting and rust removal method for offshore platform guardrail fence.

Background technique:

Offshore platform is a large-scale engineering structure on the sea. Its steel structure has been exposed to salt spray, moisture and sea water for a long time, and is corroded by sea water and marine organisms, resulting in severe electrochemical corrosion. Corrosion seriously affects the mechanical properties of the structural materials of the offshore platform, thereby affecting the safety of the offshore platform. Moreover, because offshore platforms are far away from the coast and cannot be regularly docked for maintenance like ships, the builders and users of offshore platforms attach great importance to the issue of corrosion protection of offshore platforms. How to carry out long-term anti-corrosion to the structure of offshore platforms, as well as the development and research of new materials, new technologies and new processes for long-term anti-corrosion of offshore platform structures are of very important significance.

In view of the current problems of anti-corrosion of offshore platforms, a sandblasting and rust removal method for offshore platforms is proposed, which is safe and environmentally friendly. It can become the main method of the platform method, reduce environmental pollution, and realize the coordinated development of ecological environment and resource utilization. . Because water-based coatings are not suitable for burning and explosion, they can reduce unsafe hazards. At the same time, they can be applied simultaneously with other coatings, which improves the life of offshore platforms and will be more widely used in future development.

In order to achieve the above-mentioned purpose, the technical scheme adopted by the present invention is:

a method for sandblasting and rust removal of an offshore platform, Comprising the following steps:

Step 1. Select high-quality copper ore, and strictly require the particle size of copper ore to ensure that the particle size of copper ore is 8-20 mesh. The requirements in terms of shape, hardness, and moisture content are required to ensure that the full ocean platform is sandblasted. Claim;

Step 2. Control the blasting air pressure to 0.4~0.6MPa, and ensure that the compressed air is clean and dry;

Step 3. Choose suitable climatic conditions, use thermometers, hygrometers and other testing tools to measure, ensure that the ambient temperature during construction is 25-40C, and the relative air humidity (in the open air) ≤ 85%;

Step 4. Strictly control the operation process during sandblasting. The angle between the abrasive jetting direction and the workpiece is 75-85°. When the nozzle diameter increases by 20%, the nozzle should be replaced. Further, in step 1, ensure that the copper ore particle size is 10 to 18 days. Further, in step 2, control the blasting air pressure to 0.5 MPa. Further, in step 4, the distance between the spray gun and the working surface is 200~400mm.