涂层附着力测试仪 
为满意的涂装质量，涂层粘结在被涂装的底材上。有三种不同的附着力测试方法来评估涂层在底材上剥落的能力。划格试验又被称为划格法，使用刀片切割涂层至底材。至少以 90° 夹角十字切割两次，得到一个直角格子图案。观察十字切割区域是否有脱漆现象。第二种涂层附着力测试方法使用针型划针或环型划针，在被测涂层上逐渐加大作用力，直至涂层剥离底材。第三种方法称为拉开法附着力试验，测量将涂层从底材上拉脱下来的拉张应力大小。将胶粘柱块粘合到涂层表面，在粘合剂完全固化后，将胶粘柱块连接到载荷夹具。在垂直方向上逐渐增加张力，直至胶粘柱块下方的涂层从底材上分离。记录下导致涂层脱离所需力的。 

霍夫曼划痕硬度仪是经济实用的涂层附着力测试仪。 

尺寸小，适用于现场或工厂测试 
设计灵活，可以施加过2400克的力 
易于使用和操作 

基本配置: 
1块标准大游码 
1块标准小游码, 另加一个刮划工具 
携带箱 
操作手册

 

Hoffman Scratch Hardness Tester

Article No. 1610

Hoffman Scratch Tester
Adhesion tester for scratch and mar resistance

 

Features

The Hoffman Scratch Hardness Tester was developed for the comparative evaluation of scratch resistance and adhesion of many types of coatings.

• Small size for in the field or plant testing
• Flexible design – can apply more than 2400 gram force
• Easy to use and operate

 

Procedure

To operate, attach riders to the scale arm at the numbered positions. The carriage is held down firmly by hand and moved in the opposite direction, to cause a trailing scratch. The large standard rider loads 100 g per division, while the small rider loads 25 g per division. This small rider may be used for making low-range measurements involving small increments of pressure, or it may serve as a vernier with the large rider in making more precise medium-range measurements.

Scratch Hardness
The force necessary to cut through the film to the substrate.

Adhesion
The force required to scrape a path through the film, when the stylus begins its motion on an uncoated portion of the panel.

 

Technical Attributes

 

General

• Weight

  0.7 kg

• Weight

  1.5 lb

• Dimensions: L x W x H

  28 x 2.5 x 3.8 cm

• Dimensions: L x W x H

  11 x 1 x 1.5 in
  
   

 

Delivery Content

Tester
Large Rider (1612)
Small Rider (1613)
Scratching tool (1611)
Manual
Carrying case