重防腐涂料喷涂施工常见误区及对策

发布日期：2012-11-02

阅读量：1688

重防腐涂料喷涂工艺通常运用于防腐寿命要求高、使用环境苛刻的产品，典型的如风力发电机、海洋船舶部件等，这些产品的重防腐漆料、喷涂实施过程均有细致严格的要求。重防腐涂料喷涂后，其形成涂层的主要特点：①厚膜化，重防腐涂料干膜厚度通常在200μm以上，甚至可高达2mm；②重防腐喷涂层需要具有在苛刻条件下长效防腐的能力，在化工大气和海洋环境里，一般要求可使用10年或15年以上；③涂层有良好的附着力、物理性能和力学性能，对钢铁基体或其它被涂物有较强的附着力。

风电、海洋船舶部件的特殊使用环境、高额的维修成本、喷涂施工的特殊性，决定了喷涂质量的经济重要性，喷涂企业必须保证防腐喷涂的施工质量，避免给自己和客户带来经济损失。

1 重防腐漆料喷涂过程控制要点

严格的涂装施工管理：三分产品、七分施工；强调关键过程控制，持续优化。反之，如果发现过程不符，无论产品测量结果如何，都有必要考虑重新喷涂，消除隐于无形的质量隐患。

1.1 严格的涂装前处理

1.1.1 毛坯外观质量检查与清洗

钢铁件表面平整及边角倒圆，对保证涂层膜厚的均匀、涂层附着能力很重要。除油不彻底及过度锈蚀，可能造成喷砂时表面处理不达标，尤其是对表面要求较高的涂料，如无机富锌漆，通常会导致后序涂层剥落。

毛坯外观及清洗质量不达标，缘于操作者不明确控制标准、不了解毛坯质量与涂漆质量的因果关系。对于初期施工的喷涂车间，此类现象比较普遍，可通过规范化施工方案来解决。首先，要求技术人员能够根据不同产品的特点，针对不同部位编制施工方案，避免一个施工方案指导所有产品施工，回避各个产品的特殊点。施工方案应指出产品各个部位如何做到：平整底材，避免凹凸、砂眼；打磨自由边(一般R=2mm)；明确多孔质的铸件，在流程上保证放置足够的时间，彻底去油去水，必要时采用加热法蒸发油污水分。另外，应确保压缩空气管道安装油水分离器。

1.1.2 喷射表面处理

可能存在磨料选用不当，如钢砂、钢丸不加区分；只看粗糙度值，简单认为粗糙度越大，涂层附着力会越高；喷砂后停留超过规定时间(如6h)，仍安排喷涂；喷砂后吊运、踩踏、触摸喷砂面，局部污染，不能有效处理到位。

该问题的纠正，首先应明确粗糙度的实质。粗糙度可从几个方面来认识：①形状(粗糙度微观轮廓),取决于是棱角砂还是丸料；②深度(微观波峰与波谷的距离)；③密度(波峰与波谷的数量)，如图1。

专栏：行业资讯

作者：金宗机械

来源：行业资讯

原文链接： 阅读原文

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FreeMarker template error (HTML_DEBUG mode; use RETHROW in production!)


The following has evaluated to null or missing:
==> langConfig  [in template "public_include/wap/module/version_1/language.html" at line 49, column 14]

----
Tip: If the failing expression is known to be legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing</#if>. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)??
----

----
FTL stack trace ("~" means nesting-related):
	- Failed at: #if langConfig.status?string = "false"  [in template "public_include/wap/module/version_1/language.html" at line 49, column 9]
	- Reached through: #include "/public_include/wap/module/...  [in template "tpl/2018/03/17/2613443926933696//wap/com_5.html" at line 5, column 1]
	- Reached through: #include "com_5.html"  [in template "tpl/2018/03/17/2613443926933696//wap/displaynews.html" at line 69, column 6]
----

Java stack trace (for programmers):
----
freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...]
	at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134)
	at freemarker.core.UnexpectedTypeException.newDesciptionBuilder(UnexpectedTypeException.java:80)
	at freemarker.core.UnexpectedTypeException.<init>(UnexpectedTypeException.java:43)
	at freemarker.core.NonHashException.<init>(NonHashException.java:49)
	at freemarker.core.Dot._eval(Dot.java:48)
	at freemarker.core.Expression.eval(Expression.java:81)
	at freemarker.core.BuiltInsForMultipleTypes$stringBI._eval(BuiltInsForMultipleTypes.java:692)
	at freemarker.core.Expression.eval(Expression.java:81)
	at freemarker.core.EvalUtil.compare(EvalUtil.java:111)
	at freemarker.core.ComparisonExpression.evalToBoolean(ComparisonExpression.java:62)
	at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:48)
	at freemarker.core.Environment.visit(Environment.java:327)
	at freemarker.core.Environment.visit(Environment.java:333)
	at freemarker.core.Environment.include(Environment.java:2509)
	at freemarker.core.Include.accept(Include.java:171)
	at freemarker.core.Environment.visit(Environment.java:327)
	at freemarker.core.Environment.visit(Environment.java:333)
	at freemarker.core.Environment.include(Environment.java:2509)
	at freemarker.core.Include.accept(Include.java:171)
	at freemarker.core.Environment.visit(Environment.java:327)
	at freemarker.core.Environment.visit(Environment.java:333)
	at freemarker.core.Environment.process(Environment.java:306)
	at freemarker.ext.servlet.FreemarkerServlet.processEnvironment(FreemarkerServlet.java:946)
	at freemarker.ext.servlet.FreemarkerServlet.process(FreemarkerServlet.java:910)
	at freemarker.ext.servlet.FreemarkerServlet.doGet(FreemarkerServlet.java:769)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at com.kenfor.iyong.web.util.filter.NotAllowedToTunFilesFilter.doFilter(NotAllowedToTunFilesFilter.java:154)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at com.kenfor.iyong.web.util.filter.InvalidXSSFilter.doFilter(InvalidXSSFilter.java:40)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
	at com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve.invoke(RedisSessionHandlerValve.java:26)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528)
	at org.apache.coyote.ajp.AbstractAjpProcessor.process(AbstractAjpProcessor.java:873)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)

FreeMarker template error: The following has evaluated to null or missing: ==> langConfig [in template "public_include/wap/module/version_1/language.html" at line 49, column 14] ---- Tip: If the failing expression is known to be legally refer to something that's sometimes null or missing, either specify a default value like myOptionalVar!myDefault, or use <#if myOptionalVar??>when-present<#else>when-missing. (These only cover the last step of the expression; to cover the whole expression, use parenthesis: (myOptionalVar.foo)!myDefault, (myOptionalVar.foo)?? ---- ---- FTL stack trace ("~" means nesting-related): - Failed at: #if langConfig.status?string = "false" [in template "public_include/wap/module/version_1/language.html" at line 49, column 9] - Reached through: #include "/public_include/wap/module/... [in template "tpl/2018/03/17/2613443926933696//wap/com_5.html" at line 5, column 1] - Reached through: #include "com_5.html" [in template "tpl/2018/03/17/2613443926933696//wap/displaynews.html" at line 69, column 6] ---- Java stack trace (for programmers): ---- freemarker.core.InvalidReferenceException: [... Exception message was already printed; see it above ...] at freemarker.core.InvalidReferenceException.getInstance(InvalidReferenceException.java:134) at freemarker.core.UnexpectedTypeException.newDesciptionBuilder(UnexpectedTypeException.java:80) at freemarker.core.UnexpectedTypeException.(UnexpectedTypeException.java:43) at freemarker.core.NonHashException.(NonHashException.java:49) at freemarker.core.Dot._eval(Dot.java:48) at freemarker.core.Expression.eval(Expression.java:81) at freemarker.core.BuiltInsForMultipleTypes$stringBI._eval(BuiltInsForMultipleTypes.java:692) at freemarker.core.Expression.eval(Expression.java:81) at freemarker.core.EvalUtil.compare(EvalUtil.java:111) at freemarker.core.ComparisonExpression.evalToBoolean(ComparisonExpression.java:62) at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:48) at freemarker.core.Environment.visit(Environment.java:327) at freemarker.core.Environment.visit(Environment.java:333) at freemarker.core.Environment.include(Environment.java:2509) at freemarker.core.Include.accept(Include.java:171) at freemarker.core.Environment.visit(Environment.java:327) at freemarker.core.Environment.visit(Environment.java:333) at freemarker.core.Environment.include(Environment.java:2509) at freemarker.core.Include.accept(Include.java:171) at freemarker.core.Environment.visit(Environment.java:327) at freemarker.core.Environment.visit(Environment.java:333) at freemarker.core.Environment.process(Environment.java:306) at freemarker.ext.servlet.FreemarkerServlet.processEnvironment(FreemarkerServlet.java:946) at freemarker.ext.servlet.FreemarkerServlet.process(FreemarkerServlet.java:910) at freemarker.ext.servlet.FreemarkerServlet.doGet(FreemarkerServlet.java:769) at javax.servlet.http.HttpServlet.service(HttpServlet.java:622) at javax.servlet.http.HttpServlet.service(HttpServlet.java:729) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at com.kenfor.iyong.web.util.filter.NotAllowedToTunFilesFilter.doFilter(NotAllowedToTunFilesFilter.java:154) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at com.kenfor.iyong.web.util.filter.InvalidXSSFilter.doFilter(InvalidXSSFilter.java:40) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:121) at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502) at com.orangefunction.tomcat.redissessions.RedisSessionHandlerValve.invoke(RedisSessionHandlerValve.java:26) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79) at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:528) at org.apache.coyote.ajp.AbstractAjpProcessor.process(AbstractAjpProcessor.java:873) at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:687) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1520) at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1476) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) at java.lang.Thread.run(Thread.java:745)