High temperature vacuum contact angle water resistance test

1、 What is high temperature contact angle? Why measure?

Contact angle is an important parameter for characterizing the wettability between liquid and solid surfaces. Especially in high-temperature industrial fields such as metallurgy, ceramics, welding, glass manufacturing, etc., the wetting behavior of materials in a high-temperature molten state directly affects product quality and process optimization. For example, the wettability between molten metal and furnace wall in metallurgical processes determines the rate of scale formation, while the wettability of solder in welding processes directly affects welding strength.

However, high temperature environments have strict requirements for measuring equipment, which need to balance high temperature stability, vacuum compatibility, precise temperature control, and anti-interference imaging technology. Traditional contact angle measuring instruments are difficult to meet such requirements, while professional high-temperature contact angle measuring instruments such as Shengding Precision SDC-1500 have solved these technical problems through innovative design.

2、 Principle of High Temperature Contact Angle Measurement Technology

1. Core measurement methods

High temperature contact angle measurement needs to be carried out in a controlled environment, and common methods include:

① Droplet method: Drop molten liquid onto a solid surface, record the droplet shape through an optical system, and calculate the contact angle.

② Suspended droplet method: suitable for synchronous measurement of surface tension of high-temperature melts, analyzing surface tension and contact angle through droplet profile fitting.

③ Dynamic analysis: Real time monitoring of the impact of temperature changes on wettability, such as SDC-1500 supporting wetting dynamic analysis and video fitting, which can capture rapidly changing wetting processes.

2. High temperature environment control

High temperature measurement requires precise temperature control and vacuum/atmosphere adjustment:

① Temperature range: Shengding SDC-1500 supports normal temperature to 1500 ℃ under normal pressure, and can reach 1400 ℃ under vacuum environment (optional).

② Temperature control accuracy: 30 segment intelligent program temperature control is adopted, with a maximum heating rate of ≤ 10 ℃/min. The temperature control accuracy is below 1000 ℃, ± 0.1 ℃, above 1000 ℃, ± 1 ℃, ensuring experimental repeatability.

③ Vacuum system: Equipped with a combination of mechanical pump and molecular pump (optional), the vacuum degree can reach 10 ⁻⁷ Pa, meeting the requirements of inert gas or reducing atmosphere.

3、 The core advantages of Shengding SDC-1500 high-temperature contact angle measuring instrument

1. Multi functional analysis software

① Algorithm diversity: Supports 12 fitting methods such as circle method, ellipse/oblique ellipse method, Young Laplace equation, etc., to adapt to different droplet shapes.

② Dynamic analysis: Real time measurement of surface tension changes and static and dynamic contact angles, outputting reports in EXCEL and Word formats.

2. High temperature resistant structure and safety design

① Heating module: high-purity alumina material heating tube and quartz tube (purity 99.99%), ensuring temperature uniformity.

② Dual cooling system: Dual cooling device, 5-35 ℃ temperature control, flow rate 15L/min, cooling system capacity ≥ 11L, cooling capacity 1520W.

③ Safety protection: Dual protection gas access and vacuum interlock control to avoid high-temperature oxidation or sample contamination.