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  • 发布日期:2018-01-30      浏览次数:1111
    •   欧美汽车部件复合盐雾试验箱测试项目



      1.0 introduction 介绍

      1.1 TEST SCOPE 试验范围

      This standard specifies an accelerated laboratory atmospheric corrosion test. The testing environment addressed is similar in effect to that of the salt load/ climatic part of the proving ground corrosion test procedure, CETP 00.00-R-343 and yields corresponding results. The objective of the test is to allow evaluation of the corrosion resistance of metals in environments where there is a significant influence of chloride ions, mainly as sodium chloride from a marine source or by winter road de-icing salt. The laboratory test provides full exposure to the salt load and humidity environment. It does not attempt to simulate other engraving factors such as mud loads, temperature stresses or wear.  It serves as a general purpose atmospheric corrosion test and applies to a variety of materials, coatings, and interactions of materials, both as test specimens or in designed components. The test can be used as a design verification method in order to (a) develop and qualify new corrosion resistant products, (b) develop new pre-treatments and finishing processes, (c) select materials and, (d) perform quality control of the final product. 



      The standard specifies controlled conditions for equipment and procedures to allow the test to be performed with a high degree of repeatability and reproducibility. It is designed to be suitable to run in various climate chambers, either as a fully automated procedure or with partial manual operations.



      1.2 SUMMARY OF TEST CONTENT 试验内容摘要

      The workday test procedure consists of: 工作日的试验程序由以下几个方面组成:

      A 6 h wet phase at room temperature. with intermittent exposure to salt solution (0.5% NaCl).

      A 2.5 h transition phase with drying under climate control.

      A 15.5 h phase with constant temperature and humidity (50°C, 70% RH).



      15.5小时的恒温恒湿阶段(50°C, 70% RH)


      After repeating this procedure Mon-Fri a 48 h weekend phase under continued constant climate control is added.



      1.3 COMMONALITY 共通性

      This is a CONTROL TEST and can be used to qualify components throughout the world.  The test may be conducted at any location having the necessary equipment and facilities.  Proposed revisions to this procedure must be submitted per FAP03-179. 



      2.0 Instrumentation 仪器

      The following elements are usually required to conduct the test procedure:



      2.1 Compressed, clean air of 4 - 6 bars for cleaning salt solution from spray nozzles, as a source for the renewal of chamber air and for humidification, supplied by spray humidifiers.

      2.1    4-6 bar的干净的压缩空气,用于清理喷嘴上的盐溶液、箱内换气和喷雾加湿器进行加湿。


      2.2 A low conductivity water supply (20 mS max) for humidification or evaporative spray humidifiers and for the preparation of salt solutions.

      2.2    一根低导电率的供水管(zui大20 mS),用于加湿或喷雾加湿器以及准备盐溶液。


      2.3 A tank for preparation and storage of salt solution or, alternatively, a system for direct on-line mixing of water and saturated NaCl solution to the actual concentration (0.5 ± 0.05% by weight)

      2.3    一个用于准备和存储盐溶液的水槽,或者一套直接在线按实际浓度(0.5 ± 0.05%,按重量)混合水和饱和氯化钠溶液的系统。


      2.4 A conductivity meter with built-in temperature compensation for preparation and control of the 0.5% NaCl salt solution (conductivity: 8.3 mS/cm + 0.80 at 20°C). A 0.50% by weight NaCl solution is used as a calibration standard at each measurement.

      2.4    一个带内置温度补偿的电导仪,用于准备和控制0.5%的氯化钠盐溶液(温度为20°C时的导电性:8.3 mS/cm + 0.80)。 一份按重量为0.50%的氯化钠溶液,作为每次测量时的校正标准。


      2.5 A high quality device for independent control of temperature and relative humidity shall be accessible. This instrument shall on a stipulated regular interval (Ref 5.4) be used for independent monitoring and calibration of the conditions in the very test plane of the exposure chamber. The total measurement error must not exceed 0.1°C.

      2.5    一套高质量的设备,用于独立控制温度和相对湿度。该设备按照规定的时间间隔(参考5.4),独立监控和校正试验箱李的试验平面上的各项条件,测量总误差不超过0.1°C


      2.6 Racks of inert material for support and aligned fixation of test specimens must not hamper a free air-flow around the test objects, nor collect standing wetness. The test objects in a rack must not screen one another from the salt solution downfall and they should be exposed with the stipulated exposure angle to the spray (15- 20 degrees inclination from vertical).

      2.6    由惰性材料制成的夹具,用于支撑、排列和固定试样,但不得妨碍试样周围的空气流通,不得累积水分。夹具上的试样不得相互遮蔽导致盐溶液淋不到试样上。试样应按规定的角度曝露到喷雾中(偏离垂直线15-20度)。


      2.7 Pressurized hand-spray equipment for application of the 0.5% NaCl solution if a manual spray procedure is used. The capacity must be sufficient to meet the downfall requirement (Ref. 3.3.1).

      2.7    如需采取手动喷洒,应使用适用于0.5%盐溶液的加压型手动喷雾器,喷雾器的容量必须能满足喷洒要求(见3.3.1)。


      2.8 Funnels, beakers/ measuring glasses and a balance with at least 0.1 g accuracy for monitoring and calibration of salt solution downfall throughout the test plane of the exposure chamber.

      2.8    漏斗、烧杯/量杯以及度至少为0.1g的天平,用于监控和校准曝露箱中试验平面上落下的盐溶液。


      2.9 All test measurement equipment must be calibrated and maintained per FAP03-015, Control, Calibration, and Maintenance of Measurement and Test Equipment.

      2.9    所有试验的测量设备的校准和维护必须按照《FAP03-015测量和试验设备的控制,校准和维护程序》。


      2.10 All applicable safety guidelines and procedures must be followed.

      2.10  试验须遵守所有适用的安全指引和安全程序。


      3.0 Equipment and facilities 设备设施

      The necessary, permanently installed facility to conduct the test consists of a programmable humidity chamber of good quality. It is preferably equipped with an integrated rig for spraying salt solution of the required amount and accuracy, cooling capacity and a good internal circulation system for the conditioned air (Fig. 1). The exposure chamber shall be designed so that the test conditions described in the subsequent paragraphs can be obtained, controlled, and monitored during the test.