ASTM D6675

ASTM D6675 汽車鋼板上有機涂層的鹽加速戶外表面腐蝕試驗的標準實施規(guī)程（機動車薄鋼板上有機涂層的鹽加速戶外表面腐蝕試驗的標準實施規(guī)程）

ASTM D6675發(fā)行信息

標準號ASTM D6675-2001(2006)

中文名 機動車薄鋼板上有機涂層的鹽加速戶外表面腐蝕試驗的標準實施規(guī)程

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

發(fā)布日期2001

實施日期

廢止日期無

中國標準分類號A29;G50

國際標準分類號43.040.60 (Bodies and body components)

發(fā)布單位US-ASTM

ASTM D6675適用范圍

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.

本實施規(guī)程中所述類型的試驗可用于評估暴露在高鹽環(huán)境中的金屬產(chǎn)品上有機涂層的耐腐蝕性，例如受除冰鹽影響的區(qū)域或沿海區(qū)域。暴露條件復雜多變。重要因素包括氣候、一年中的時間、是否存在污染等。通常很難（如果不是不可能的話）精確地定義或測量影響降解的所有因素。需要在不同季節(jié)和至少兩年的時間內(nèi)重復進行暴露試驗，以獲得代表任何給定位置的結(jié)果。

必須始終使用對照試樣，因為這是一項比較試驗。