DIN50018

2021年2月11日发(作者：重奖)

DIN50018 Testing in Alternating Condensation Atomosphere Containing

Sulphur Dioxide

含二氧化硫浓缩气氛下的交互试验

1

、

Purpose and range of application

适用范围和目的

.

This

standard

describes

the

general

condition

which

must

be

observed

for

testing

samples

in condensation atmosphere containing

sulphur dioxide, so that comparable results

are obtained when the test is carried out in different laboratories.

本标准描述了必须符合测试样品要求的含二氧化硫浓缩气 氛一般情形，

以便在不

同实验室获得的试验结果可比较。

The

test

allows

defects

in

corrosion

protection

systems

to

be

detected

quickly.

Exposure

to

these

test

atmospheres

does

not

allow

any

direct

conclusions

to

be

drawn

regarding

the

life of the tested components

under practical duty conditions.

This, however,

does

not

exclude

the

possibility,

once

ample

experience

has

been

gained

regarding

the

long-term

behaviours

of

specific

systems

in

an

industrial

atmosphere,

of

being

able

to

establish a relationship between the behaviour

in practical service and

the behaviour under

test conditions, particularly in atmosphere DIN 50 018

–

SFW0.25.

该试验可以很快发现在腐蚀保护系统里的缺陷，暴露在这类试 验气氛下，不能得

出任何关于试验对象实际应用寿命的直接结论；但也不排除这种可能， 即在获得关于

在工业气氛下的特定系统的长久性能的足够经验后，

能够确定实际应用性能和试验性

能之间的关系，尤其是在

DI N 50 018

–

SFW0.25

的气氛下。

It

is advisable to test only

identical corrosion protection system simultaneously

in one

and

same

test

facility,

since

the

possibility

of

interaction

between

samples

representing

different system cannot be excluded.

由于代表不同系统的样品之间影响的可能性不可避免，同时在 一个测试设备对仅

有同样的防腐处理系统进行试验是可行的。

When

different

corrosion

protection

systems

are

tested

simultaneously

and

different

materials

are

present,

it

should

be

borne

in

mind

that

different

effects

are

often

brought

about

by

sulphur

dioxide.

Direct

comparison

of

the

results

of

tests

on

different

combinations

of

corrosion

protection

systems

and

materials

is

therefore

not

readily

permissible.

当不同腐蚀保护系统同时被测试，我们应知道，二氧化硫气氛经常会有不同的试

验结果，一般不能直接比较腐蚀保护系统下的不同化合物和材料的试验结果。

Sample form, sample preparation, test duration, evaluation of the test and assessment of

the results are

not

the subject of

this Standard. Details on these points will be

found

in

the

relevant Standards or special specifications, or are to be agreed case by case. In particular,

the remarks in DIN 50 905 part 1 to part 3 are to be observed when carrying out this test.

< /p>

样品形状，样品准备，试验持续时间，评估试验和试验结果，都不是本标准的主

< p>
题，在别的标准或专门的技术规范里可以找到这些方面的详细资料，或者一次次试验

后得到认可。特别的情况，按

DIN 50 905

部分

1 to

部分

< br>3

的说明进行试验。

2

、

Other relevant Standards

（相关标准）

DIN 50 900 Part 1 Corrosion of metals; definitions, general definition.

金属腐蚀，定义，一般定义

DIN 50 900 Part 2 Corrosion of metals; definitions, electrochemical definition.

金属腐蚀，定义，电化学定义

DIN 50 900 Part 1 Corrosion of metals; chemical corrosion tests, general.

金属腐蚀，化学腐蚀试验，概要

DIN

50

900

Part

2

Corrosion

of

metals;

chemical

corrosion

tests,

corrosion

values

with

uniform surface corrosion.

金属腐蚀，化学腐蚀试验，均匀腐蚀表面的腐蚀数据

DIN

50

900

Part

3

Corrosion

of

metals;

chemical

corrosion

tests,

corrosion

values

with

non- uniform corrosion absence of additional mechanical stress.

金属腐蚀，化学腐蚀试验，没有附加机械应力的不均匀腐蚀表 面的

腐蚀数据

3

、

Definition

(

定义

)

According to DIN 50 900 Patr1 and Part2.

按照

DIN 50 900 1

部分

and 2

部分

4

、

Test condition

at the star of

the

first test phase

in each cycle the test chamber

temperature

is

raised

to

±

31

℃

over

a

period

of

about

1

1/2

hours.

At

the

same

time

condensation

forms

on

the

samples. This wetting

must persist throughout the

further progress of

the

first test phase. It

is

during

this

stage

that

the

test

reaches

maximum

everity

through

the

the

simultaneous

action of sulphur dioxide.

每个循环的第一试验阶段开始时，在

1.5

小时内把测试室温度调到±

31

℃，同时，

对样品进行浓缩，

其湿度应能保持整个试验阶段一。

通过

SO2

的同时作用，

在试验阶

段达到最大

。

Note: the sulphur dioxide admitted at the start of the

first test phase quickly dissolves

to

a

great

extent

in

the

water

in

the

bottom

of

the

test

chamber.

At

the

start

of

the

test,

therefore, the effective sulphur dioxide concentration

in the

gas space

is only about 1/7 of

theoretical

concentration.

This

initial

concentration

does

not

remain

constant

during

the

first phase, but instead drops sharply at first and thereafter more slowly

.

注意：

SO2

应在试验开始阶段确认已经最大程度溶解到测试室底部的水里，

因此，

在试验开始时，空间的浓缩

SO2

的作 用只有理论浓度的

1/7

。这初始的浓度不会在第

一阶段的试验中一直保持不变，而是刚开始下降很快，后面变慢。

The second

test phase starts

with the disconnection of the

heat supply and the opening

or

ventilating

of

the

test

chamber,

which

must

lead

to

the

establishing

after

about

1

1/2

hours of the test conditions according to the Table.

试验第二阶段，停止加热打开测试室通风，按下表实验条件

1. 5

小时后即可。

Type of test condition

试验条件

Condensation atmosphere

（浓缩气氛）

Cycle

Test phase 1

h

试验阶段

1

Theoretical SO

2

concentration start of a cycle

循环开始时理论的

SO

2

浓度

% by vol.

（体积百分比）

0.067*

DIN50 018-SFW0.2S

0.33*

DIN50 018-SFW1.0S

0.67*

DIN50 018-SFW2.0S

8 including heating

8

小时（含加热时间）

Test phase 2

h

试验阶段

2

Total

h

总共

Conditions

in test

space

试验室条件

16 including cooling

16

小时（包含冷却时间）

(test chamber opened ventilate)

实验室要通风

24

40

±

3

Approx. 100(wetting of test specimens)

大约

100

（试验样品湿度）

18 to 28

Max.75

0.67

Temperature

℃

Test phase 1

Relative humidity%

Temperature

℃

Relative humidity%

Test phase 2

Water quantity in the test space

% by vol.

试验室水含量

体积百分比

1)

For a test

facility

with a

test chamber

volume of 300l,the theoretical

so

2

concentration

corresponds to an so

2

admission per cycle of 0.2l, 1.0l, 2.0l.

测试室体积为

300L

的设备，对应每个循环

SO

2

理论的浓度是

0.21L,1.0L,2.01L.

2)

For a test

facility with a

volume of 300l,

this concentration corresponds to a quality of

2l

测试室体积为

300L

的设备，相应

S O

2

浓度是

2L

*Usually known abroad under the old designation RRSt 1405.

*

通常国外 在旧

RR

标准

1405

以下。

5

、

Test facility(

试验设备

)

5.1 Test chamber

（测试室）

Testing in a warm humid atmosphere containing sulphur dioxide requires a test chamber

with a volume of at least 300L closed all round and sealed and having walls consisting of a

corrosion-resistant

material

which,

moreover,

must

not

influence

the

corrosion.

The

test

chamber

must have a bottom trough capable of being

heated and of

holding

the quantity of

water

prescribed

in

the

Table.

The

heating

of

the

test

chamber

takes

place

only

via

this

water bath.

在温热潮湿含

SO

2

气氛下试验，需要一个至少

300L

封闭的 并有防腐蚀壁的容器，

而且，不能影响腐蚀。测试室必须有能加热和容纳表中所要求的水 用量的底槽，加热

就是通过测试室底槽水浴进行的。

A

suitable

temperature

measuring

and

control

device

must

be

available

in

the

test

chamber. The temperature is measured in the immediate vicinity of the samples. The valves

necessary

for

pressure

equalization

and

the

gas

inlet

must

be

located

above

the

water

surface.

The roof of

the test chamber

must be so constituted as to prevent condensate

from

dripping

down

on

to

the

samples.

The

shape

and

size

of

the

test

chamber

are

optional,

provided that the requirements of Section 5 and 7 are fulfilled. The

illustration shows a test

facility with a chamber volume of 300L.

测试室要有温度测量和控制装置，温度要靠近样品测量，压力调节阀和进气阀必

须装在水面以上，测试室顶必须这样设计，是为了防止冷凝物滴到样品上。测试室的

形状和尺寸是可选的，只要符合第

5

、

7

节的要求。图中所示即为

300L

的测试室。

The

test

chamber

is

to

be

set

up

in

a

room

without

corrosive

atmosphere,

at

room

temperature and a relative

humidity not exceeding 75%, and so

installed that

it

is protected

from draughts and sola irradiation.