ERICHSEN 耐擦洗试验机494 MC主要用于评估油漆

涂层的耐擦洗性

主要用于评估油漆

涂层的耐擦洗性. 测试参数可灵活设置也可用于客户

特殊的测试用途如测试清洁剂等.

测试原理（摘录原标准）

a) Test in accordance with DIN 53 778- 2 *)

The scrub body is a defined pig bristle brush, which

is charged with 250 g. The washing fluid is

continuously fed by a micro dosing pump. Whether

the contamination has been removed or the coating

is scrubbed through to the substrate, will be

checked after an agreed number of scrubbing

cycles.

*) withdrawn, replaced by DIN EN ISO 11998

b) Test in accordance with ASTM D 2486

The scrub body is a defined nylon brush, which is

charged with 454 g. The washing liquid is applied

manually during the test at regular intervals and in a

defined amount. For sharpening the wear effect of

the scrubbing action, a narrow thin strip of metal

sheet will be placed centrally and transversely to

the stroke direction unter the foil. The test result is

the number of double strokes up to scrubbed

through to the substrate.

c) Test in accordance with DIN EN ISO 11 998

The scrubbing body is a defined type of abrasive

pad **) loaded with 135 g, which is moistened prior

to the test only once with a defined quantity of the

washing fluid. After scrubbing strain (200 double

strokes) the mass loss per unit area of the coating

and the average layer thickness loss will be

determined.

**) Abrasive pad "3M Scotch Brite, No. 7448" can be obtained

from the local dealer.

工作原理

仪器底部螺丝可调水平，上面装有钢槽用于测试. 两

侧配备样品夹紧装置.通过精密地步进马达和微处理

器确保运行速度准确可靠，具有极高的重复性.

可旋转的摩擦刷固定架可以同时安装3个摩擦刷，这

样可以同时进行3个测试.

通过按键和6位显示屏进行操作，具有以下功能:

- 控制行程 (启动，停止,重置),

- 设置测试参数 (摩擦速度, 路径,摩擦次数),

- 可存储最多20个测试程序。