page_title: Corrosion engineering
section_title: Filiform Corrosion
hierarchical_section_title: Corrosion engineering / Types of corrosion situations / External corrosion / Filiform Corrosion
caption_attribution_description: English: Filiform corrosion spreading from scribe on painted aluminum after complete accelerated corrosion testing (ACT version 2)
context_page_description: Corrosion engineering is an engineering specialty that applies scientific, technical, engineering skills, and knowledge of natural laws and physical resources to design and implement materials, structures, devices, systems, and procedures to manage corrosion.
context_section_description: Filiform corrosion may be considered as a type of crevice corrosion and is sometimes seen on metals coated with an organic coating (paint).
caption: Filiform corrosion on painted aluminum
exif: {"Image Make": "NIKON CORPORATION", "Image Model": "NIKON D5300", "Image Orientation": "Horizontal (normal)", "Image XResolution": "300", "Image YResolution": "300", "Image ResolutionUnit": "Pixels/Inch", "Image Software": "Adobe Photoshop CS3 Windows", "Image DateTime": "2016:06:30 07:10:57", "Image YCbCrPositioning": "Centered", "Image ExifOffset": "240", "GPS GPSVersionID": "[2, 3, 0, 0]", "Image GPSInfo": "908", "Thumbnail Compression": "JPEG (old-style)", "Thumbnail XResolution": "72", "Thumbnail YResolution": "72", "Thumbnail ResolutionUnit": "Pixels/Inch", "Thumbnail JPEGInterchangeFormat": "1022", "Thumbnail JPEGInterchangeFormatLength": "1999", "EXIF ExposureTime": "1/4", "EXIF FNumber": "8", "EXIF ExposureProgram": "Aperture Priority", "EXIF ISOSpeedRatings": "200", "EXIF SensitivityType": "Recommended Exposure Index", "EXIF ExifVersion": "0230", "EXIF DateTimeOriginal": "2016:06:29 14:24:27", "EXIF DateTimeDigitized": "2016:06:29 14:24:27", "EXIF ComponentsConfiguration": "YCbCr", "EXIF CompressedBitsPerPixel": "4", "EXIF ExposureBiasValue": "-1", "EXIF MaxApertureValue": "17/5", "EXIF MeteringMode": "Pattern", "EXIF LightSource": "Unknown", "EXIF Flash": "Flash did not fire", "EXIF FocalLength": "105", "EXIF SubSecTime": "50", "EXIF SubSecTimeOriginal": "50", "EXIF SubSecTimeDigitized": "50", "EXIF FlashPixVersion": "0100", "EXIF ColorSpace": "sRGB", "EXIF ExifImageWidth": "6000", "EXIF ExifImageLength": "4000", "Interoperability InteroperabilityIndex": "R98", "Interoperability InteroperabilityVersion": "[48, 49, 48, 48]", "EXIF InteroperabilityOffset": "876", "EXIF SensingMethod": "One-chip color area", "EXIF FileSource": "Digital Camera", "EXIF SceneType": "Directly Photographed", "EXIF CVAPattern": "[2, 0, 2, 0, 0, 1, 1, 2]", "EXIF CustomRendered": "Normal", "EXIF ExposureMode": "Auto Exposure", "EXIF WhiteBalance": "Auto", "EXIF DigitalZoomRatio": "1", "EXIF FocalLengthIn35mmFilm": "157", "EXIF SceneCaptureType": "Standard", "EXIF GainControl": "None", "EXIF Contrast": "Normal", "EXIF Saturation": "Normal", "EXIF Sharpness": "Normal", "EXIF SubjectDistanceRange": "0"}