CN114773973A

CN114773973A - Temporary protective coating applied to ocean engineering equipment transportation and preparation method

Info

Publication number: CN114773973A
Application number: CN202210306801.5A
Authority: CN
Inventors: 盖登宇; 褚元召; 张佃梅; 周阳
Original assignee: Harbin Engineering University
Current assignee: Harbin Engineering University
Priority date: 2022-03-25
Filing date: 2022-03-25
Publication date: 2022-07-22

Abstract

The invention provides a temporary protective coating applied to ocean engineering equipment transportation and a preparation method thereof, and the preparation method of the welding spatter protective coating provided by the invention is prepared by taking SK (Ss-04) aliphatic radix asparagi manual polyurea as a matrix and adding a multifunctional antirust lubricant, zinc phosphate and PU reactive diluent PEC. Compared with the traditional manual polyurea, the peelable protective coating has moderate peel strength, and the peel strength of the coating can be adjusted according to requirements; compared with the traditional manual polyurea, the peelable protective coating has moderate tearing strength, can be completely peeled off from the surface of a workpiece in a continuous and unbroken form, and is suitable for temporary protection of the workpiece; compared with the traditional anti-rust oil, the strippable protective paint disclosed by the invention has high solid content, is pollution-free in the coating and protecting processes, is healthy and environment-friendly, and saves the subsequent cleaning cost.

Description

Temporary protective coating applied to ocean engineering equipment transportation and preparation method

Technical Field

The invention relates to a temporary protective coating for ocean engineering equipment, and belongs to the field of metal protection.

Background

The ocean engineering equipment mainly refers to large-scale engineering equipment and auxiliary equipment in the aspects of ocean resource (particularly ocean oil and gas resource) exploration, exploitation, processing, storage and transportation, management, logistics service and the like, has the characteristics of high technology, high investment, high yield, high added value and high risk, is a comprehensive body of advanced manufacturing, information, new materials and other high and new technologies, has strong industrial radiation capability and has a great driving effect on national economy. Because the processing precision is high, the shape is complex, and the like, the protection quality in the transportation and storage process is highly required. The traditional protection mode in the large-scale finish machining part industry is mainly that solvent diluted anti-rust oil with high viscosity and certain hardness is coated on the surface of the finish machining surface of a large-scale part in the transportation and storage processes, but the protection mode has many problems in practical application: (1) the hard film rust inhibitor or the wax film rust inhibitor needs to be cleaned by using a large amount of cleaning solvent, the time is taken for several days, the hard film rust inhibitor or the wax film rust inhibitor can be removed by repeatedly soaking and wiping for many times, the treatment period is longer, and certain pollution is caused to the field environment; (2) the traditional antirust oil layer is easily damaged by the influence of external factors, and once a local oil layer is lost, the occurrence of corrosion defects is caused; (3) the use of a large amount of volatile organic solvent in a construction site brings great potential safety hazard to the safety production in the site.

Through the research on the leading edge technology of packaging protection at home and abroad, the strippable protective coating technology is the most effective and economic means for solving the problems.

Object of the Invention

The invention aims to provide a temporary protective coating applied to marine engineering equipment transportation, which can play a role in protection against salt mist, chemical media, water, impact and the like in the transportation process of a precision instrument of marine engineering equipment, can be completely stripped from the surface of a workpiece after the transportation process is finished, and does not influence the workpiece.

The preparation method of the welding spatter protection coating provided by the invention is characterized in that SK (Ss-04) aliphatic radix asparagi manual polyurea is used as a matrix, and a multifunctional antirust lubricant, zinc phosphate and PU reactive diluent PEC are added to prepare the welding spatter protection coating.

The purpose of the invention is realized as follows:

(1) adding 20-50% of antirust lubricant into a beaker, slowly adding zinc phosphate into the beaker while stirring by a stirrer, simultaneously performing ultrasonic treatment in the adding process, wherein the amplitude is 4, the stirring speed is 500r/min, and continuously performing ultrasonic treatment for 10 minutes;

(2) adding the mixture prepared in the step (1) into an SK (Ss-04) aliphatic radix asparagi manual polyurea component A, stirring by using a stirrer in the adding process, carrying out ultrasonic treatment at the rotating speed of 800r/min and the amplitude of 4 at the same time, continuously carrying out ultrasonic stirring for 10 minutes, and cooling by using an ice bag in the ultrasonic treatment process to prevent the mixture from being overheated;

(3) adding 10% of PU reactive diluent PEC into the paint prepared in the step (2), and continuously stirring for 45 minutes by using a stirrer to prepare a strippable protective paint component A applied to marine engineering equipment transportation;

(4) and (4) mixing the component A of the welding spatter protection coating prepared in the step (3) with the component SK (Ss-04) aliphatic aspartic manual polyurea component B according to the mass ratio of 1:1 (the mass ratio refers to the mass ratio of the original polyurea component A to the mass ratio of the original polyurea component B being 1:1), continuously stirring for 2 minutes by using a stirrer, uniformly mixing the two components, and coating the mixture on a workpiece to obtain the strippable coating.

Compared with the prior art, the invention has the beneficial effects that:

(1) compared with the traditional manual polyurea, the peelable protective coating has moderate peel strength, and the peel strength of the coating can be adjusted according to the requirement;

(2) compared with the traditional manual polyurea, the peelable protective coating has moderate tearing strength, can be completely peeled off from the surface of a workpiece in a continuous and unbroken form, and is suitable for temporary protection of the workpiece;

(3) compared with the traditional anti-rust oil, the strippable protective paint disclosed by the invention has high solid content, is pollution-free in the coating and protecting processes, is healthy and environment-friendly, and saves the subsequent cleaning cost;

(4) compared with the traditional anti-rust oil, the strippable protective coating has good impact resistance.

(5) Compared with the traditional manual polyurea, the strippable protective coating has longer gel time and longer operable time.

Drawings

FIG. 1 is a graph of coating peel force.

Detailed Description

The invention is described in further detail below with reference to the drawings and the detailed description.

The invention discloses a welding spatter protection coating, which comprises the following preparation steps:

(1) adding 20-50% of antirust lubricant into a beaker, slowly adding 5-15% of zinc phosphate into the beaker while stirring by a stirrer, and continuously stirring and ultrasonically treating the beaker for 10min, wherein the amplitude of the zinc phosphate is 4 and the stirring speed is 500 r/min;

(2) adding the mixture prepared in the step (1) into an SK (Ss-04) aliphatic asparagus manual polyurea component A, stirring by using a stirrer in the adding process, carrying out ultrasonic treatment at the rotating speed of 800r/min and the amplitude of 4 at the same time, continuously carrying out ultrasonic stirring for 10min, and cooling by using an ice bag in the ultrasonic treatment process to prevent the mixture from being overheated;

(3) adding 10% of PU reactive diluent PEC into the paint prepared in the step (2), and continuously stirring for 45min by using a stirrer to prepare a strippable protective paint component A applied to ocean engineering equipment transportation;

(4) and (3) mixing the component A of the welding spatter-proof protective coating prepared in the step (3) with the component B of the aliphatic aspartic manual polyurea of SK (Ss-04) according to the mass ratio of 1:1 (the mass ratio refers to that the component A and the component B of the original polyurea is 1:1), continuously stirring for 2min by using a stirrer, uniformly mixing the two components, and coating the mixture on a workpiece to obtain the strippable coating.

Example 1

Coating layers with the 2% of the antirust lubricant, the 5% to 15% of the zinc phosphate and the 1% to 10% of the PEC (polyurethane) PU reactive diluent are prepared on the tinplate according to the steps (1), (2), (3) and (4), the coating layers are cured at room temperature and dried at room temperature for 7 days, and the prepared coating layers are tested for peel strength, and the test results are shown in figure 1. It can be seen from fig. 1 that the peeling force of the coating is moderate, and the coating can be easily peeled off from the surface of the substrate.

Example 2

Preparing coatings with the content of the anti-rust lubricant of 20-50%, the content of zinc phosphate of 5-15% and the content of PU reactive diluent PEC of 1-10% on the tinplate according to the steps (1), (2), (3) and (4), curing at room temperature, drying at room temperature for 7 days, and performing a neutral salt spray corrosion test on the prepared coatings, wherein the test result is as follows: after the 720h neutral salt spray corrosion, the coating has no bubbling and damage phenomena, the test panel is intact, no rusting phenomenon occurs, and the coating still has strippability.

Example 3

Preparing a coating with the content of the anti-rust lubricant of 20-50%, the content of zinc phosphate of 5-15% and the content of PU reactive diluent PEC of 1-10% on a tinplate according to the steps (1), (2), (3) and (4), curing at room temperature, drying at room temperature for 7 days, carrying out chemical medium resistance and water resistance tests on the prepared coating, and respectively soaking the sample in a 5% NaOH solution and a 5% H solution₂SO₄In deionized water, test results: after a 720-hour water-resistant and acid-base-resistant soaking experiment is carried out on a paint film, the test panel is intact after the coating is stripped.

Example 4

Preparing coatings with the content of the anti-rust lubricant of 20-50%, the content of zinc phosphate of 5-15% and the content of PU reactive diluent PEC of 1-10% on the tinplate according to the steps (1), (2), (3) and (4), curing at room temperature, drying at room temperature for 7 days, and carrying out an impact resistance test on the prepared coatings, wherein the test result is as follows: the coating layer has no phenomena of cracks, wrinkles, peeling and the like under the impact strength of 50kg cm.

According to the technical scheme adopted by the embodiment, the peel strength and the tear strength of the product are carried out according to the following standards:

neutral salt spray corrosion test: GB/T1771-2007;

chemical medium resistance test: GB/T9274-1988;

and (3) testing water resistance: GB/T1733 + 1993;

and (3) impact resistance test: GB/T1732-.

Claims

1. A preparation method of a temporary protective coating applied to ocean engineering equipment transportation is characterized by comprising the following steps:

(1) adding 20-50% of antirust lubricant into a beaker, slowly adding zinc phosphate into the beaker while stirring by using a stirrer, simultaneously performing ultrasonic treatment in the adding process, wherein the amplitude is 4, the stirring speed is 500r/min, and continuously performing ultrasonic treatment for 10 minutes;

(2) adding the mixture prepared in the step (1) into an SK (Ss-04) aliphatic asparagus manual polyurea component A, stirring by using a stirrer in the adding process, carrying out ultrasonic treatment at the rotation speed of 800r/min and the amplitude of 4 at the same time, continuously carrying out ultrasonic stirring for 10 minutes, and cooling by using an ice bag in the ultrasonic treatment process to prevent the mixture from being overheated;

(3) adding 10% of PU reactive diluent PEC into the paint prepared in the step (2), and continuously stirring for 45 minutes by using a stirrer to prepare a component A of the strippable protective paint applied to ocean engineering equipment transportation;

(4) and (3) mixing the component A of the welding spatter-proof coating prepared in the step (3) with the component B of the aliphatic aspartic manual polyurea of SK (Ss-04) according to the mass ratio of 1:1 (the mass ratio refers to the mass ratio of the component A to the component B being 1:1), continuously stirring for 2 minutes by using a stirrer to uniformly mix the two components, and coating the mixture on a workpiece to obtain the strippable coating.

2. A temporary protective coating for marine engineering equipment transportation, characterized in that it is prepared by the method of claim 1.