水性无机耐高温涂料的研制及其性能研究.pdf

东南大学

硕士学位论文

水性无机耐高温涂料的研制及其性能研究

姓名：朱秋华

申请学位级别：硕士

专业：材料学

指导教师：吴申庆

20070110

东南大学硕士学位论文

摘要

耐高温涂料的主要任务是对高温环境下的材料进行表面防护。在对国内外耐高温涂料进行广泛调研的基础上，本论文采用几种常见的无机材料，例如石英粉、氧化铝短纤维等为填料，以钠水玻

璃为主要成膜物质，研制出新型具有环保意义的水性无机耐高温涂料。

通过正交试验优化配方，并考察了涂料组分如氧化铝短纤维等组分因素对涂层性能的影响，最

终确定最佳配方，固体中各组分的含量分别为：高岭土45．5％、石英粉31．8％、铁红13．6％、氧化铝短纤维4．6％、填料A 4．6％：固液比l：1；液相为97．7％钠水玻璃和少量助剂。考察同化工艺对涂层耐高温性能的影响。对涂装在金属和非金属试样表面的涂层进行检测，测试了多项性能，如耐高温性、

抗剪性、热震性、耐盐水性等，并与进口涂料和国产涂料进行比较。结果表明：自制涂料总体性能

优于国产涂料，部分性能等同或优于进口涂料。初步探讨了涂料的耐高温机理及失效机理。钠水玻

璃经固化后形成三维网状膜，具有优异的耐高温性能，氧化铝短纤维的加入承担部分应力，阻滞裂

纹扩展，可减缓涂层高温下失效。

关键词：水性无机涂料，耐高温，氧化铝短纤维

东南大学硕士学位论文Abstract

Protecting substrates，exposed to

high temperature

environments from hot erosion is the most

important

task of the

high-

temperature resistant

coating．On the

basis of

reviewing

the

updated

of those

coatings，normal inorganic materials，such

as

silica

power and alumina short fibers are

used as fillers and sodium soluble glass as the main membrane former．A coating of

environment friendship is aimed to develop．

Orthogonai design Was used to

optimize

the

coating formulation,and the

effect ofthe

conponents Oil

the properties of

the coating,such as alumina short fiber and kaolin were studied．The optimized

formulation was then

got：the respective solid content ofkaolin

clay,silica powder,red

iron oxide，alumina

shortfiberandfillerAWas45．5％、31．8％、13．6％、4．6％and4．60／o respectively,andthe ratiobetween solid

and liquid Was l：1．A few

ofliquid auxiliaries of sodium soluble glass

were

added．111e effect ofcuring technology Was

also studied．The self-made coating was

painted

on

sheets

ofmetal

or

nonetai

as samples

to

prepare tests such

as high-temperature resistance,shear resistance，thermal shock,salt tolerance and SO On．

Results show that the self-made

coating

performs more excellently than the domestic coating,while some

properties of it ale

equal

or

better than that of the import coating．The mechanism of high-temperature

resistance Ware also discussed．Three-dimentional netted membrane was

formed when sodium soluble

glass condensed．It had excellent

high temperature resistance．The failure Was delayed by the

alumina short

fiber which beared

part StreSS．

Key words：waterborne inorganic comings，high-tⅢperature resistance，alumina short fiber