Nā Bolts Poʻo Countersunk i uhi ʻia ʻo Dacromet hexagon socket

2026-11-02

Hoʻohui ʻia ke poʻo poʻo hexagon-coated hexagon countersunk head bolt i ke poʻo wili countersunk flush-fitting countersunk screw me ka zinc-aluminum flake coating e hāʻawi ana i 720-1,000 mau hola o ka paʻakai paʻakai - ʻoi aku ka lōʻihi ma mua o nā bolts zinc electro-plated maʻamau. Hōʻike kēia ʻatikala i ka geometry bolt, ke kaʻina hana uhi ʻo Dacromet, kona ʻano anti-corrosion, a pehea e hoʻohālikelike ai me nā lāʻau lapaʻau ʻē aʻe no nā wili a me nā bolts.

1. Hoʻomaka: No ke aha e pono ai ka pale ʻana i ka corrosion no nā Bolts a me nā Screws

ʻO nā mea hoʻopaʻa - nā bolts, screws, nuts, a me nā mea holoi - ʻo ia nā mea ʻoi loa i ka corrosion-vulnerable i loko o nā hui bolted. Nalo ka pahu ʻōpala i ka hoʻouka ʻana, hopu ʻia i loko o kona lua i hoʻopaʻa ʻia, a hoʻopau i ka pono o ka hui holoʻokoʻa. I loko o nā kaiapuni moana, nā alahaka ala, nā hale kau o ka lā, a me nā mīkini waho, hiki i nā wili zinc-plated maʻamau ke hōʻike i ka lepo keʻokeʻo i loko o nā pule a me ka ʻulaʻula i loko o nā mahina.

2. Geometry Huahana: ʻO ka Hexagon Socket Countersunk Head Bolt

Lahi Uila	Poʻo Anawaena (dk)	Kiʻekiʻe Poʻo (k)	Hex Socket (s)	Papa Ikaika Tensile	Nā lōʻihi maʻamau
M5 × 0.8	10.0 mm	2.8 mm	4 mm	8.8 / 10.9	10–60 mm
M6 × 1.0	11.4 mm	3.3 mm	5 mm	8.8 / 10.9	12–80 mm
M8 × 1.25	15.0 mm	4.4 mm	6 mm	8.8 / 10.9	16–100 mm
M10 × 1.5	18.5 mm	5.4 mm	8 mm	8.8 / 10.9	20–120 mm
M12 × 1.75	21.5 mm	6.5 mm	10 mm	8.8 / 10.9	25–150 mm

ʻO nā pono geometry nui o kēia ʻano screw:

Nā Bolts Poʻo Countersunk i uhi ʻia ʻo Dacromet hexagon socket

ʻili ʻili- ʻaʻole e puka ke poʻo countersunk, e hoʻopau ana i nā wahi snag a ʻae i nā ʻāpana male e noho palahalaha ma ka ʻili.
Kiʻekiʻe torque kaha- Hoʻokomo ke kumu hexagon i ʻeono mau maka hoʻopili, e hoʻouna ana i 30-50% ʻoi aku ka nui ma mua o ka pahu slotted a i ʻole Phillips ma mua o ka wehe ʻana.
Hoʻopili pili— nā lola mīkini piha piha (a i ʻole nā lola hoʻopaʻa ponoʻī no nā palapala metala) hāʻawi i ka hoʻopaʻa axial ikaika o ka hui bolted.

3. ʻO ka Dacromet Coating: Pehea e hana ai

ʻO Dacromet kahi inoa inoa inoa i lilo i huaʻōlelo ʻoihana maʻamau no nā uhi palaki zinc-aluminum hoʻohana ʻia e ka dip-spin a i ʻole ka pulupulu a hoʻōla ʻia ma kahi o 300 °C. ʻAʻole like me ka electroplating, ʻaʻole electrolytic ke kaʻina hana, no laila ʻaʻole i hoʻokomo ka uhi i ka hydrogen embrittlement - kahi mea palekana koʻikoʻi no nā bolts ikaika kiʻekiʻe o ka papa 10.9 a i luna.

ʻO ka uhi ʻana he matrix hina-hinahina o ka zinc a me nā flakes alumini (maʻamau 0.1–0.5 µm mānoanoa, 15–20 µm ka nui) i hoʻopaʻa ʻia e kahi mea hoʻohui pūhui chromium inorganic. ʻO kāna hana anti-corrosion he ʻekolu ʻano:

4. Anati-Corrosion Hana: Paakai Spray Data

ʻO ka hoʻāʻo benchmark no ka pale ʻana i ka ʻōpala paʻa ka hoʻāʻo ʻana i ka paʻakai paʻakai (NSS) ma ka ISO 9227 / ASTM B117. Hoʻohālikelike ka Papa 3 i nā wili i uhi ʻia me Dacromet me nā lāʻau lapaʻau maʻamau maʻamau.

Papa 3 — Hoʻohālikelike kūʻē i ka corrosion (hōʻike NSS, hola i ka ʻeleʻele ʻulaʻula mua)

Lapaʻau ʻili	Mānoanoa maʻamau	ʻAka Keʻokeʻo	ʻAla ʻulaʻula	ʻO ka pilikia o ka hoʻoheheʻe ʻana o ka hydrogen	Kumukuai Index
ʻO ka hoʻoheheʻe zinc maʻemaʻe (Zn)	5–8 µm	24–96 h	150–300 hola	Kauwaena	1.0
Hoʻopalapala zinc melemele (Zn-Cr)	5–8 µm	96–200 hola	300–500 hola	Kauwaena	1.2
Hoʻopuʻu wela (HDG)	50–100 µm	—	1,000–2,000 h	Haʻahaʻa	1.5
Dacromet (1 kapa)	5–8 µm	480–720 h	720–1,000 hola	ʻAʻohe	1.8
Dacromet (2-3 kapa)	10–24 µm	1,000+ h	1,500–2,500 h	ʻAʻohe	2.2
Dacromet + sila-luna	10–24 µm	1,200+ h	2,000–3,000 h	ʻAʻohe	2.5

5. Ka hopena

Hoʻopau ke poʻo poʻo hexagon i uhi ʻia e Dacromet i nā pilikia kahiko ʻelua i ka hoʻopaʻa ʻana i ka wili - ka ʻōpala a me ka protrusion - i loko o kahi ʻāpana. Hāʻawi ka countersunk geometry i kahi hui puʻupuʻu, maʻemaʻe, snag-free me ke kiʻekiʻe-torque hexagon drive, ʻoiai ka zinc-aluminum flake coating e hāʻawi i ka mōhai a me ka pale pale anti-corrosion mau hola 1,000 a ʻoi aʻe paha i ka hoʻāʻo ʻana i ka paʻakai, me ka ʻole o ka hydrogen embrittlement. No nā ʻenekinia a me nā mea kūʻai aku e hōʻike ana i nā wili a me nā bolts no waho, moana, a i ʻole kaʻa kaʻa kaʻa, hāʻawi kēia papa hoʻopaʻa i kekahi o nā ratios corrosion-protection-to-cost maikaʻi loa i loaʻa i ka ʻenehana bolting hou.

Mamua. Aʻe.

Nūhou hou loa