positioning-kld
三防漆膜厚测试规范
Coating thickness test
specification
文件编号
File No
版
本
Rev.
生效日期
Effective
date
页
码
page
修订履历
Updated
History
序号
No.
1.
目的
purpose:
控制我司产品
三防漆涂覆均匀、一致性，达到客户膜厚要求范围，确保产品品质。
To
control
uniformity
of
coating,
meet
customer
requirements
of
the
thickness
of
coating,
ensure
the quality of the
products.
2.
范围
scope:
本公司使用的自动涂覆工艺。
Automatic
coating process in our company.
3.
职责
R
esponsibilities
3.1
工程部：技术要求及各项参数的制定；
Engineering
Department:
setting technical
requirements and parameters;
3.2
生产部：按涂覆作业文件作业；
Production
department:
operating according to
SOP
3.3
品质部：对三防漆涂
覆层厚度进行抽检；
Quality
department:
Checking thickness of
coating
４
.
定义：
Definition
４
.1
三防漆（
Conformal coating
）：是一种特殊配方的涂料，用于保护线路板及其相关设备
免受环境的侵蚀，从
而提高并延长它们的使用寿命，确保使用的安全性和可靠性。
Conformal
coating
is a special
ingredient of
coating, used for
protection of circuit board and
related
equipment against being eroded , so as to improve
and prolong their service
life,
ensuring the safety and reliability.
４
.
２
磁性测厚法：
当测头与覆层接触时，
测头与
磁性金属基体构成一闭合磁路，
由于非磁性
覆层的存在，使磁路
磁阻发生变化，通过测量其变化量，可测得其覆层的厚度；
Magnetic
measuring thickness
method:
when the probe contact the coating, sensors and
magnetic
metal form
a
closed magnetic circuit, due
to the non
magnetic coatings, the
magnetic
原内容
Updated
History
修订后
updated
旧版
Rev.
修订人
updated
by
修订日期
date
文件编号
File No
版
本
Rev.
生效日期
Effective
date
三防漆膜厚测试规范
页
码
Coating thickness test
specification
page
circuit
reluctance
to
change,
by
measuring
the
variation
can
be
measured
the
thickness
of
coating;
４
.
３
涡流测厚法：
利用高频交变电流线圈中产生一磁场，
当测头与金属接触时，
金属基体
上会产生涡流，
并对测头具有反馈作用，
通过其反馈作用的大小可测出覆层厚度；
Eddy
current measuring
thickness method: using high frequency alternating
current produces a magnetic
field in
the coil, when the probe in contact with metal,
metal will produce eddy current, and has a
feedback effect on the measuring head,
through the feedback effect can be measured the
size of the
thickness of
coating
5.
内容
Content
5.1
测试板准备：
Preparing
t
est board
:
5.1.1
将标准的测铁板或铝板表面清洁干净，不能有任何
杂物；
Cleaning
the
surface
steel
or
aluminum board , there can be no
rubbish;
5.1.
２
对清洁好的测试板进行烘烤，
去掉水份；
Baking
the
test
plate
cleaned
for
removing
the
water;
5.1.
３
测试板上不能有凹凸不平现象，如有更换测试板。
The
test board
can
not
be
uneven,
Replacing the testing board, If the
board uneven.
5.
２
测试
仪的校准
（我司采用的是磁性、
涡流综合测试仪）
：
calibrating the gauge
(It
is
used
the magnetic, eddy current
gauge in our
company
)
5.
２
.1
打开涂层测厚仪（
ＧＴ
8102
）“ＯＮ”键，自动恢复上次关机前的参数设置，
仪器自
动进入待测试状态；
Press the ON key to switch on the
gauge. The gauge will restore the
state
of last operation itself.
5.
２
.2
在待测状态下将探头垂直压在待测铝板或铁板上，
屏幕上会显示
《
*.**um
》
,
< br>然后按
下“
zero
”键进行零
位校准
；在校准过程中探头一直压在基体上，直到屏幕显不（０
cal
）
后才能提起探头。
Place
the probe on
the substrate
or an uncoated standard steadily.
the
screen will display
“
0
CAL
”
will be on the disply
before lifting the probe.