CN103041975A

CN103041975A - Rust prevention method of ship

Info

Publication number: CN103041975A
Application number: CN2012105447737A
Authority: CN
Inventors: 刘淑莲; 李玉涛
Original assignee: Wison Nantong Heavy Industry Co Ltd
Current assignee: Wison Nantong Heavy Industry Co Ltd
Priority date: 2012-12-17
Filing date: 2012-12-17
Publication date: 2013-04-17

Abstract

The invention relates to a rust prevention technology of a ship. The rust prevention technology of the ship comprises the following steps of: (1) twice surface treatments, wherein the twice surface treatments need to satisfy with the following requirements that: a coating surface before sand blasting shall have no impurity and no oil dirt; the roughness is greater than 75 microns when the to-be-coated surface is subjected to the sand blasting to Sa2%; the grinding material includes steel sands and copper ore; the allowable maximum salt value is 250 mus/cm; and the dust distribution amount of the dust with the particle sizes of 3, 4 and 5 on the surface is at the second level; and (2) coating treatment, wherein the coating treatment needs to satisfy with the following requirements that: the coating environment is required to have a relative humidity of less than 85% and the temperature of the surface of a steel plate is 3 DEG C higher than a dew point temperature; gathered seams, over-welding holes, drain holes and reinforced rib plates shall be pre-coated at least twice; for the paint stirring, a main agent shall be firstly stirred and used for testing a gun, the main agent and curing agents are mixed uniformly when the pressure of high pressure air and the type of the gun nozzle are suitable, and the spraying operation is finished within 30 min; the minimum coating interval is 3 hours, and the surface needs to be clean. The service life of the ship which adopts such the coating technology is enhanced and substantially exceeds the protective life limit of the conventional coating technology.

Description

A kind of boats and ships rust-proofing method

Technical field

The present invention relates to a kind of rust-proofing method, relate in particular to a kind of rust-proofing method of marine ship.

Background technology

The modern seagoing vessel hull overwhelming majority is welded by steel material, and the particular surroundings of operation of ship makes the corrosion failure of boats and ships hull and plant equipment quite serious.According to the cause of accident statistics that Canadian Transport Commission occurs nineteen ninety-five to 2004, the accident that the Ship Structure infringement causes on average accounts for 8% of sum, and wherein has quite a few to cause owing to marine corrosion causes Hull Strength to reduce.The failure analysis that Britain ocean engineering operation company does shows, in the example that all facilities lost efficacy, and the 33%th, caused by corrosion.According to the boats and ships concrete condition, from protection effect, requirement, the various aspects such as construction complexity and economy are set out, and select the boats and ships anti-corrosion method, carry out rational corrosion protection design, for strengthening the erosion-resisting ability of boats and ships, guarantee operation safety, have great importance.

At present, the corrosion-resistant main method is organic coating and galvanic anode protection.Can increase ship resistance but more positive piece is installed, cause overprotection, it is not enough to have lacked then protection.

The antifouling guarantee time limit of the anticorrosion with coat of prior art ship plank 3 years, to lie up every 3 years boats and ships after reaching afterwards in 3 years and outside plate be carried out the maintenance of anticorrosion and antifouling, dockage maintenance will affect shipping transport and produce a large amount of maintenance costs, and this is that each shipowner wants the work avoided.

Summary of the invention

Technical problem to be solved by this invention provides a kind of special sprayed protection, and the protection large-scale steel structure prevents from getting rusty, and this technology surpasses existing 3 years to the protection life-span of steel construction, and best the realization protected 15 years.

In order to solve the problems of the technologies described above, rust-proofing method of the present invention comprises the steps:

At first, secondary surface treatment, secondary surface treatment need satisfy following requirement: the coating surface before the sandblast is answered free from admixture and greasy dirt; Treat the coating surface sandblast to Sa2, roughness〉75 microns; Abrasive material is steel sand, copper ore; The maximum salt score value that allows is 250 μ s/cm; The surface dirt granular size is 2 grades of the dust abundances of " 3 " " 4 " " 5 ";

Again, application is processed, and application is processed need satisfy following requirement: painting environment requires relative humidity less than 85%, and the surface of steel plate temperature is higher than 3 ℃ of dew-point temperatures; Close up seam, cross welding hole, discharge orifice, reinforcement gusset answer precoating at least 2 roads; Paint stirring should stir and try first rifle to host, when high-pressure air pressure and rifle mouth model are suitable, host and curing agent together are stirred to evenly again, finishes spraying operation in 30 minutes; Minimum is covered and was coated with the interval 3 hours, and the surface needs clean.

Adopt the hull of this coating process will be strengthened service life, substantially exceed the protection time limit of existing coating process.

The specific embodiment

Concrete technology method of the present invention is as follows:

1 secondary surface treatment

1.1 the coating surface before the sandblast is answered free from admixture and greasy dirt, solvent removes oil standard according to SSPC SP1;

1.2 treat the coating surface sandblast to Sa2, operative norm ISO 8501-1:1988, roughness〉75 microns;

1.3 abrasive material is steel sand, copper ore, abrasive material test stone ISO 8502-9, and the maximum salt score value of permission is 250 μ s/cm;

1.4 the surface dirt granular size is 2 grades of the dust abundances of " 3 " " 4 " " 5 ", as without magnifying glass, is waiting that being coated with the visible more granule in surface should remove operative norm ISO 8502-3:1993;

2 applications are processed

2.1 painting environment requires relative humidity less than 85%, the surface of steel plate temperature is higher than 3 ℃ of dew-point temperatures;

2.2 close up seam, cross welding hole, discharge orifice, reinforcement gusset answer precoating at least 2 roads;

2.3 the interpolation of diluent should be according to the guidance of site technology service;

2.4 paint stirring should stir and try first rifle to host, when high-pressure air pressure and rifle mouth model are suitable, host and curing agent together are stirred to evenly again, finishes spraying operation according to on-the-spot temperature in 30 minutes;

2.5 covering, minimum is coated with interval 3-6 hour; Do not have maximum to cover and be coated with the interval, but the surface needs cleaning;

2.6 the coating decoration operation of recommending (when construction area surpasses 500m2):

A. two overlap jet pumps, sling flexible pipe, spray gun, rifle mouth. wait damageable spare parts;

B. 2 Spray Painter, 2 assistants;

C. one is used for spraying, and other one is used for acetone recycle with cleaning equipment;

D. per 30 minutes Spray Painter must change pump, and in these 30 minutes, pump of every team's construction speed can reach 20L easily to 100L, and guarantees that jet pump is without plugging fault.

3 coating equipment requirements

3.1 paint spray pump is the airless spraying pump, ratio is 63:1, should take away filter during spraying;

3.2 the consumable accessory spare part of paint spray pump should be sufficient, avoids affecting construction speed;

3.3 if the spray painting operation more than 30 minutes is used acetone solvent cleaning paint spray pump and could be continued spraying;

3.4 reversible nozzle model 6-31;

3.5 paint spraying hose length is no more than 30 meters;

3.6 the electricity that constant temperature is 20 ℃ insulation storage bin is used for storing paint;

4 paint are supporting

1000 microns of 500 microns dry film total film thicknesses of ECOSPEED 2 road X

Boats and ships hull for adopting this coating process can guarantee 15 year life-span for anticorrosion durable adhesion.

Claims

1. boats and ships rust-proofing method is characterized in that comprising following steps:

1. secondary surface treatment, secondary surface treatment need satisfy following requirement: the coating surface before the sandblast is answered free from admixture and greasy dirt; Treat the coating surface sandblast to Sa2, roughness〉75 microns; Abrasive material is steel sand, copper ore; The maximum salt score value that allows is 250 μ s/cm; The surface dirt granular size is 2 grades of the dust abundances of " 3 " " 4 " " 5 ";

2. application is processed, and application is processed need satisfy following requirement: painting environment requires relative humidity less than 85%, and the surface of steel plate temperature is higher than 3 ℃ of dew-point temperatures; Close up seam, cross welding hole, discharge orifice, reinforcement gusset answer precoating at least 2 roads; Paint stirring should stir and try first rifle to host, when high-pressure air pressure and rifle mouth model are suitable, host and curing agent together are stirred to evenly again, finishes spraying operation in 30 minutes; Minimum is covered and was coated with the interval 3 hours, and the surface needs clean.