ASTM D6675 汽车钢板上有机涂层的盐加速户外表面腐蚀试验的标准实施规程（机动车薄钢板上有机涂层的盐加速户外表面腐蚀试验的标准实施规程）

ASTM D6675发行信息

标准号ASTM D6675-2001(2006)

中文名 机动车薄钢板上有机涂层的盐加速户外表面腐蚀试验的标准实施规程

英文名 Standard Practice for Salt-Accelerated Outdoor Cosmetic Corrosion Testing of Organic Coatings on Automotive Sheet Steel

发布日期2001

实施日期

废止日期无

中国标准分类号A29;G50

国际标准分类号43.040.60 (Bodies and body components)

发布单位US-ASTM

ASTM D6675适用范围

Tests of the type described in this practice may be used to evaluate the corrosion resistance of organic coatings on metal products exposed to highly salty environments, such as areas subjected to deicing salts or coastal areas. Exposure conditions are complex and changeable. Important factors include climate, time of year, presence of pollution, and so forth. Generally it is difficult, if not impossible, to define or measure precisely all the factors that influence degradation. Repeated exposure testing during different seasons and over a period of at least two years is required to obtain results representative of any given location.

Control specimens must always be used because this is a comparative test.

1.1 This practice is designed to assist procedures to be followed when conducting outdoor exposures to evaluate cosmetic corrosion that might occur in steel panels covered with an organic coating that has been damaged. The outdoor exposures described are based on Practice G 7 and include periodic wetting of the test specimens with a salt solution.

1.2 The methods of preparing test specimens and the particular exposure requirements of materials are beyond the scope of this practice.

1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

本实施规程中所述类型的试验可用于评估暴露在高盐环境中的金属产品上有机涂层的耐腐蚀性，例如受除冰盐影响的区域或沿海区域。暴露条件复杂多变。重要因素包括气候、一年中的时间、是否存在污染等。通常很难（如果不是不可能的话）精确地定义或测量影响降解的所有因素。需要在不同季节和至少两年的时间内重复进行暴露试验，以获得代表任何给定位置的结果。

必须始终使用对照试样，因为这是一项比较试验。