MIL-DTL-16232G 是由美國DoD所核准的規範，裡面的主要分類為
Type M 磷酸錳皮膜
- Class 1 Supplementary preservative treatment or coating, as specified
- Class 2 Supplementary treatment with lubricating oil conforming to MIL-PRF-16173, Grade 3 or MIL-PRF-3150
- Class 3 No supplementary treatment
- Class 4 Chemically converted (may be dyed to color as specified) With no supplementary coating or coating as specified
Type Z 磷酸鋅皮膜
- Class 1 Supplementary preservative treatment or coating, as specified
- Class 2 Supplementary treatment with preservative conforming to MIL-PRF-16173, Grade 3 or MIL-PRF-3150
- Class 3 No supplementary treatment
- Class 4 Chemically converted (may be dyed to color as specified) With no supplementary coating or coating as specified
膜厚
磷酸錳的期許膜厚為5～10μm
磷酸鋅的期許膜厚為5～15μm
裸件鹽霧能力
磷酸錳裸件（無鈍化封孔）的鹽霧時間（ASTM B-117）至少要有 1.5小時
磷酸鋅裸件（無鈍化封孔）的鹽霧時間至少要有 2小時
附加檔案: MIL_DTL_16232G.pdf
