Cavity corrosion proof zinc-rich paint and preparing method thereof

A coating and zinc-rich technology, applied in anti-corrosion coatings, polyurea/polyurethane coatings, coatings, etc., can solve problems such as brittleness and fragility, difficult maintenance, and short service life

Inactive Publication Date: 2008-01-09
HUAZHONG NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ceramic material is dense, low porosity, and its high mechanical strength can resist mechanical action, but it requires high-temperature sintering or plasma spraying technology, which is brittle and fragile, and it is not easy to maintain; seawater containing various ions has a strong corrosion effect on the material. Even alloyed metal materials have insufficient corrosion resistance, short service life, and high cost; the advantages of elastomers are compactness, strong impact absorption, and strong anti-corrosion capabilities, but thick

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Example 1: 10 grams of carbon nanotube samples were added to 150 milliliters of concentrated HNO 3 and 250 mL concentrated H 2 SO 4 In the mixed acid, reflux at 140°C for 2 hours, filter with G-4 sand core funnel, wash with distilled water until neutral, dry at 120°C, and then add 1 gram of treated carbon nanotubes to the diluted Soak in lithium water glass solution (lithium water glass: water=1: 4), and do ultrasonic treatment for 0.5 hour, after centrifugation, add carbon nanotubes in 80 grams of lithium silicate--sodium silicate solution, stir for 5 minutes, Then ultrasonically oscillate for 30 minutes, add 20 grams of silicone acrylic emulsion, stir for 5 minutes, add 0.55 grams of potassium dichromate solution, 0.2 grams of FC80, 0.3 grams of methyltrimethoxysilane, 0.25 grams of multifunctional additives and 0.6 grams of defoaming agent, and ball milled for 30 minutes to obtain component A of the coating; component B of the coating is obtained by uniformly mixin...

Embodiment 2

[0039]Embodiment 2: The preparation process is basically the same as in Example 1, except that the treatment method of carbon nanotubes is changed. 0.5 grams of purified carbon nanotubes and 0.7 grams of silicic acid are put into a ball mill jar and milled for 0.5 hours. After the coating is made, the coating film sample B is obtained. Reserved for performance evaluation tests.

Embodiment 3

[0040] Embodiment 3: the preparation process is substantially the same as example 1, except that the ratio of common zinc powder and nanometer zinc powder in the B component of the coating is modulated by 93:7. After the coating is made, the coating film sample C is obtained. Reserved for performance evaluation tests.

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PUM

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Abstract

A zinc-enriched coating against cavity corrosion and its production are disclosed. The coating consists of carbon nanometer tube: 0.3-4 wt%, nanometer zinc powder 3-8 wt%, and organic resin additive 12-30 wt%. The process is carried out by reflux decontaminating for carbon nanometer tube by mixed acid, soaking in diluted lithium aqueous glass, centrifugal treating, collecting or mixing carbon nanometer tube with silicon acid, ball grinding, adding carbon nanometer tube into lithium silicate-sodium silicate solution, adding into organic resin, heavy potassium chromate solution, FC80, methyl-methoxide, multifunctional accessories and de-foaming agent while agitating to obtain coating component A, mixing ordinary zinc powder with nanometer zinc powder proportionally to obtain coating component B, and mixing component A with component B proportionally to obtain final product.

Description

technical field [0001] The invention relates to an anti-corrosion and anti-cavitation corrosion zinc-rich coating suitable for ship appendages and a preparation method thereof. Background technique [0002] The propellers, nozzles, tail shaft brackets, tail fins and rudder blades of the ship have been immersed in water for many years, and corrosion phenomena are common, and cavitation corrosion is particularly serious. Due to the damage of the appendage structure, the ship is often suspended for maintenance , not only caused great economic losses, but also seriously affected the ship's voyage rate. [0003] The extremely destructive mechanical action and electrochemical action are the two main factors leading to cavitation corrosion. In addition to correct material selection, reasonable structural design and proper cathodic protection, effective surface protection technology is the most effective surface protection technology to prevent cavitation corrosion. One of the fund...

Claims

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Application Information

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IPC IPC(8): C09D7/12C09D5/08C09D125/14C09D183/07C09D183/08C09D175/04
Inventor 唐一文李家麟贾志杰徐亮
Owner HUAZHONG NORMAL UNIV
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